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England and Wales High Court (Queen's Bench Division) Decisions |
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You are here: BAILII >> Databases >> England and Wales High Court (Queen's Bench Division) Decisions >> Surrey County Council v NHS Lincolnshire Clinical Commissioning Group [2020] EWHC 3550 (QB) (21 December 2020) URL: http://www.bailii.org/ew/cases/EWHC/QB/2020/3550.html Cite as: (2021) 179 BMLR 172, (2021) 24 CCL Rep 489, [2021] QB 896, [2021] 2 WLR 805, [2020] EWHC 3550 (QB) |
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QUEEN'S BENCH DIVISION
Strand, London, WC2A 2LL |
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B e f o r e :
____________________
Surrey County Council |
Claimant |
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- and - |
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NHS Lincolnshire Clinical Commissioning Group |
Defendant |
____________________
Mr Lock QC and Ms Gibbs (instructed by Brown Jacobson) for the Defendant
Hearing dates: 24 - 25 November 2020
____________________
Crown Copyright ©
The Hon. Mrs Justice Thornton
Introduction
Issues
1) Is the Council barred from advancing a private law claim given the public law issues which arise? If not;
2) Is any claim barred by reason of section 5 of the Limitation Act 1980 on the grounds that the cause of action accrued more than 6 years before proceedings were issued? If not:
3) Do the facts of this claim fall within an established category of restitution claims? If not, should the court permit the establishment of a new category of restitution claim? If so:
4) Are all the necessary elements of the cause of action of unjust enrichment made out on the facts of this case. In particular: was the PCT enriched? If so:
5) Is the defence of change of position available to the Defendant?
Unjust enrichment
a. Has the defendant been benefited, in the sense of being enriched?
b. Was the enrichment at the claimant's expense?
c. Was the enrichment unjust?
d. Are there no defences?
(Lord Steyn in Banque Financie`re de la Cite´ v Parc (Battersea) Ltd [1999] 1 AC 221, 227)
UKSC 29 are instructive:
"39. First, it is important, when dealing with personal claims based on unjust enrichment, to bear in mind what was said by Lord Goff of Chieveley in Lipkin Gorman v Karpnale Ltd [1991] 2 AC 548, 578, when rejecting a submission that, when dealing with a claim to restitution based on unjust enrichment, it was for the court to consider the question of injustice or unfairness on broad grounds, and that it should deny recovery if it thought that it would be unjust or unfair to hold the defendant liable:
"The recovery of money in restitution is not, as a general rule, a matter of discretion for the court. A claim to recover money at common law is made as a matter of right; and even though the underlying principle of recovery is the principle of unjust enrichment, nevertheless, where recovery is denied, it is denied on the basis of legal principle."
As Lord Steyn remarked in Banque Financie`re, unjust enrichment ranks next to contract and tort as part of the law of obligations (p 227). A claim based on unjust enrichment does not create a judicial licence to meet the perceived requirements of fairness on a case-by-case basis…"
"246 English law does not have a unified theory of restitution……For the moment, therefore, as Lord Hoffmann observed in Deutsche Morgan Grenfell Group plc v Inland Revenue Comrs [2007] 1AC 558, para 21, the claimant has to prove that the circumstances in which the payment was made come within one of the categories which the law recognises as sufficient to make retention by the recipient unjust." (Patel v Mirza [2017] AC 467 (Lord Sumption)).
"…There is, I think, something of a tension underneath this reasoning. It is between these two propositions. (1) The categories of unjust enrichment claims cannot be closed, for if they were this branch of the law would be condemned to ossify for no apparent reason; and nothing could be further from the common law's incremental method. But (2) such a claim must fall "within one of the hitherto established categories of unjust enrichment" which suggests (at least) that the categories rather than any overriding principle are paramount. The authorities' reluctance to assert first principles may be ascribed to the justified fear of the palm tree: if the principle of unjust enrichment does no more than to invite one judge after another, case by case, to declare that this or that enrichment is inherently just or unjust, it is not much of a principle. That is why, with all due deference, I wonder whether Lord Hoffmann's formulation in Banque Financière de la Cité v Parc (Battersea) Limited [1999] 1 AC 221 at 234C – D has not too much of a broad-brush or legislative flavour…
27. If one looks at the matter from what is perhaps a more modest standpoint, we may see at once that clear reasoning is at least required for the elaboration of any extension of unjust enrichment. Clear reasoning, if it allows a claim in seemingly new circumstances, will provide clear analogues with other cases. No doubt this is what Mann J had in mind when he qualified his reference to established categories by the phrase "or some justifiable extension thereof.
28. I make these points only to show, with respect, that Miss McNeill's forceful plea that this case lies outside the established categories of unjust enrichment may do less than justice to the subtleties of the way the law develops."
Chronology
Date | Event |
30 March 1989 | JD's Date of Birth |
9 August 2006 | JD is placed by Surrey Council at Broughton House College, Lincolnshire in discharge of the Council's statutory duties to JD under the Children Act 1989. Placed there whilst a child |
30 March 2007 | JD turns 18 and becomes an adult |
30 March 2007 onwards | The Council funds accommodation and care services for JD pursuant to its duties to him under section 21 of the National Assistance Act 1948 as continued under the Care Act 2014 |
30 October 2007 | The Council invites Lincoln NHS Trust to undertake an assessment for JD's eligibility for NHS Continuing Healthcare (CHC). There does not appear to be substantive response to this request from Lincolnshire PCT |
19 March 2008 | The Council makes further request to Lincoln NHS Trust to undertake a CHC assessment in relation to JD |
26 March 2008 | Lincoln NHS Trust confirms that JD's case is being considered |
14 May 2008 | Lincoln NHS Trust seeks information about details of JD's case, including his original place of residence and the circumstances in which he had been placed in Lincolnshire |
24 September 2008 | Lincoln NHS Trust informs the Council that it will not undertake a CHC assessment in relation to JD because it considers that, even if JD were eligible for CHC, it would not be the responsible NHS commissioner for care for JD. The PCT suggests that, according to its understanding of relevant statutory framework and its interpretation of the "Who Pays" guidance, Surrey Primary Care Trust would be the responsible NHS commissioner and thus Surrey PCT should undertake any CHC assessment The Defendant accepts that Lincoln PCT made an error of public law in this decision |
21 July 2009 | The Council makes a further request for Lincoln NHS Trust to assess JD's eligibility for CHC. There does not appear to be a substantive response to this request from the PCT |
7 April 2010 | Surrey Council makes further request for CHC assessment of JD to Lincolnshire PCT |
13 May 2010 | Lincolnshire PCT reaffirms its position of 24 September 2008 that it believes that it is not the responsible commissioner for NHS services for JD and so will not undertake a CHC assessment in relation to JD The Defendant accepts that Lincolnshire PCT made an error of public law in this decision |
28 July 2011 | The Council asks Surrey PCT to assess eligibility for CHC |
28 July 2011 | Decision Support Tool (DST) completed by Surrey PCT |
6 October 2011 | Surrey PCT Panel decides that, on the basis of a clinical assessment of the evidence presented in the DST, JD would be eligible for CHC. However, Surrey PCT declines to fund CHC for JD on the basis that it believes that Surrey PCT is not the responsible NHS commissioner for services for JD |
20 October 2011 | Surrey PCT CHC Panel meeting. Surrey Council seeks to persuade Surrey PCT to take over responsibility for JD and liaise with Lincolnshire PCT. It is unclear what happens but Surrey PCT does not contact Lincolnshire PCT. |
October 2011 to March 2014 | The Council continues to discharge its duties to JD under the National Assistance Act 1948 by funding accommodation and care services for JD |
31 March 2013 | Lincolnshire PCT is abolished and its NHS commissioning responsibilities transferred to Lincolnshire NHS Clinical Commissioning Group NHS England created on 1 April 2013 |
18 March 2014 | The Council contacts Lincolnshire NHS Clinical Commissioning Group, copying in NHS England, in relation to what it described as the "historical unresolved Responsible Commissioner (RC) dispute" concerning JD This email and action taken by the Council at this point appears to be precipitated by the fact that, as set out in the email, "the accommodation that Jamie is living in is only registered for him to remain there until he is 25 and because of his age (25 this week!) and his needs, an accommodation move is now inevitable… It will fall to his responsible commissioner to commission alternative accommodation arrangements." |
March 2014 to July 2014 | The Council and Lincolnshire NHS CCG exchange emails regarding who is the responsible NHS commissioner for JD, including a request for further information about JD's placement so that Lincolnshire NHS CCG could fully consider the matter |
2 April 2014 | A meeting takes place between representatives of the Council and Lincolnshire NHS CCG at Broughton House regarding JD's case |
28 July 2014 | The Council requests the intervention of NHS England in resolving the dispute |
1 August to 28 August 2014 | Various representatives of Lincolnshire NHS CCG communicate with NHS England about the matter |
29 August 2014 | NHS England confirms by email its view that Lincolnshire NHS CCG is the responsible commissioner for JD |
29 August 2014 | Lincolnshire NHS CCG responds by email confirming that it will "arrange to contact Surrey [i.e. the Council] to undertake a DST" |
December 2014 to February 2015 | Steps taken to progress JD's CHC assessment |
10 February 2015 | Decision taken by Lincolnshire NHS CCG that JD is eligible for CHC. Lincolnshire NHS CCG confirms that it will be responsible for a fully funded care package for JD with effect from 1 February 2015 |
11 March 2016 | First letter from the Council to Lincolnshire NHS CCG requesting payment for period 1 August 2008 to 31 January 2015 |
31 July 2019 | Proceedings issued |
The regulatory framework
The duty on Primary Care Trusts/ Clinical Commissioning Groups to provide healthcare
"(1) The Secretary of State must provide throughout England, to such extent as he considers necessary to meet all reasonable requirements– …"
The duty of Local Authorities to provide community care services
a. NHS services are services which are not means tested and attract no charges for the patient/service user whereas social care services are means tested.
b. The commissioning body for such services is usually the CCG under the National Health Service Act 2006 ("the NHS Act") as opposed to a local authority under the Care Act 2014.
Separate statutory duties
The dividing line – NHS Continuing healthcare
"'NHS continuing healthcare' means a package of ongoing care that is arranged and funded solely by the NHS where the individual has been found to have a 'primary health need' as set out in this guidance. Such care is provided to an individual aged 18 or over, to meet needs that have arisen as a result of disability, accident or illness. The actual services provided as part of the package should be seen in the wider context of best practice and service development for each client group. Eligibility for NHS continuing healthcare places no limits on the settings in which the package of support can be offered or on the type of service delivery"
Decision making concerning Continuing Health Care
"A person only becomes eligible for NHS continuing healthcare once a decision on eligibility has been made by a CCG, informed by a completed Decision Support Tool or Fast Track Pathway Tool. Prior to that decision being made, any existing arrangements for the provision and funding of care should continue, unless there is an urgent need for adjustment."
Dispute resolution
"Any dispute between a Primary Care Trust and the relevant social services authority about –
(a) a decision as to eligibility for NHS Continuing Healthcare; or
(b) where a person is not eligible for NHS Continuing Healthcare, the contribution of the Primary Care Trust or social services authority to a joint package of care for that person,
shall be resolved in accordance with a dispute resolution procedure agreed between the two bodies concerned."
"If there is a disagreement about a decision, or who pays for necessary care, the PCT's "local resolution" process will usually be the first step… (executive summary)
For cases where there is a dispute between NHS bodies, or between LA and PCT about responsibility, the bodies should put in place a local dispute resolution process, which proceeds in a robust and timely manner. Disputes should not delay the provision of the care package and the protocol should make clear how funding will be handled during the dispute." (para 98)
"We set out the processes to follow when there is a disagreement concerning an eligibility decision (executive decision)."
"Directions state that PCTs and Las in each local area should agree a local dispute resolution process to resolve cases where there is a dispute between NHS bodies, or between LA and a PCT, about eligibility for NHS continuing healthcare and/or about the apportionment of funding in joint funded care/support packages. Disputes should not delay the provision of the care package, and the protocol should make clear how funding will be provided pending resolution of the dispute. Where disputes relate to LAs and PCTs in different geographical areas, the relevant LA and PCT should agree a dispute resolution process to ensure resolution in a robust and timely manner. This should include agreement on how funding will be provided during the dispute, and arrangements for reimbursement to the agencies involved once the dispute is resolved."
"Who Pays? sets out the expectations for when there is a dispute between PCTs as to responsibility?"
"…The NHS is expected to act in the best interests of the patient at all times and work together in the spirit of partnership. Ministers have specifically asked to be advised of NHS bodies who are unable to reach local resolution to any disputes between themselves..." (emphasis as in the document).
"Resolving disputes
The Department expects that all disputes will be resolved locally, ideally at PCT level, using the general principles above to come to pragmatic solutions...
If, in exceptional circumstances, disputes cannot be resolved at [Strategic Health Authority] level, the SHA's) involved should send a report on the case to the Department of Health ...contact with the Department for Health should only be considered as a very last resort."
The public law error by Lincolnshire PCT - Commissioning responsibility
Witness evidence
"41. For as long as I can recall, NHS bodies have worked under very considerable financial pressure. The demands on our resources are always far greater than our ability to fund services. Without getting into the complexities of NHS financing, I can assure the court that the practical consequences of the mistake made by LPCT and then SWLCCG in not providing funding over many years was not that the NHS body ended the year with a profit. On the contrary, failing to fund services for JD would have reduced any overspend which the NHS body was facing or, if there was no overspend, would have enabled the NHS body to fund services for other patients.
42. It is not possible to go back over so many years in order to determine the precise financial position for either LPCT or SWLCCG in any of the relevant years where the Council is making its claim. If, as it appears, an understandable and honest mistake was made in that funding responsibility was not accepted by these NHS bodies and if, which is a matter of speculation, an evaluative judgment had been made that JD was eligible for CHC, those NHS bodies would have been obliged to commission a package of services for JD. It is impossible to say whether either of these bodies would have taken the decision to continue commissioning services for him at Broughton House or would have arranged services for him in a different way, potentially at a lower cost.
43. However, the only beneficiaries of this honest mistake were other patients who had services funded for them when those services would not have been provided if the same money had been used to fund services for JD. Given that resources are and have always been so tight within the NHS, I can say it is certain that neither LPCT or LWCCG benefited from this mistake, in the sense that it banked the money which would have been spent on funding JD and retained that as a "profit". The people who benefited from the mistake were other patients who got services which may not have otherwise been provided to them. Given that the resources which would have been spent funding services for JD were spent supporting other patients, I fail to see how it can be said that any NHS body has become enriched as a result of this mistake."
The Court's findings on the evidence
Submissions of the parties
Discussion
Introduction
1) Should the claim have proceeded by way of judicial review?
"a. The exclusivity principle applies where the claimant is challenging a public law decision or action and a) his claim affects the public generally or b) justice requires for some other reason that the Claimant should proceed by way of judicial review;
b. The exclusivity principle should be kept in its proper box. It should not become a general barrier to citizens bring private law claims in which the breach of a public law duty is one ingredient."
"66. Let me now turn to the present case. The claimant's claim is based upon the allegation that the defendants delivered to him after-care services pursuant to section 117 of the 1983 Act but failed to make payment for those services as was their duty.
67. The defendants raise some formidable defences to that claim, but they can have no legitimate objection to the claimant proceeding under Part 7 of the CPR. This is a private law claim, even though based upon section 117 of the 1983 Act. It has no wider public impact. Justice does not require for any other reason that the claimant should proceed by way of judicial review. If the exclusivity principle is allowed to block this claim, it will become an instrument of injustice.
68. In the result, therefore, I dismiss the first ground of appeal."
"I must determine on proper analysis whether the Claimant's case amounts to a challenge to public law action or decision, rather than an attempt to assert some private right which cannot be determined without an examination of the validity of a public law decision".
"The complaints made of the All Wales Special Review Panel) (AWSRP) in the Particulars of Claim are central, explicit and suitable for determination by judicial review. For instance… the Claimant submits that the AWSRP applied irrelevant criteria…"
…
I am far from persuaded that a civil action in the High Court is the optimum way of resolving such disputes...
…
The AWSRP is a specialist body, experienced in the determination of the needs of a patient for continuing health care. ... By contrast the High Court exercises a general jurisdiction and when confronted with a case such as the present it must choose between the opinions of experts. He was therefore 'satisfied that the institution of the present proceedings by writ rather than by application for judicial review deprives the LHBs of protection that they would otherwise have enjoyed and is inconsistent with the just conduct of the proceedings."
Discussion
"[138] Before leaving the question of restitution, I note that the judge considered (first judgment 10-12) that the time limit for claims for judicial review in CPR Pt 54.5 applied to the claim for restitution because he regarded its primary focus to be a challenge to the Council's failure to determine the licence fee for the relevant years, a public law act or decision. He relied in part on the decision of Plender J in Jones v Powys Local Health Board [2008] EWHC 2562 (Admin). As the judge extended time, it is not necessary to decide whether he was correct, but I do not consider that he was. The factor making the payee's enrichment unjust is rooted in public law, but the right to restitution and the obligation to make restitution are part of the private law of obligations. Just as there is no requirement that the time limit for judicial review applies to the tort of misfeasance in public office, so also it should not apply to claims seeking restitution against public bodies: see the discussion and the decisions cited in Williams, Unjust Enrichment and Public Law (2010) 49-52, and Burrows, A Restatement of the English Law of Unjust Enrichment (2012), para 21(4) and the commentary at 113."
"39. The emphasis can therefore be said to have changed since O'Reilly v Mackman [1983] 2 AC 237. What is likely to be important when proceedings are not brought by a student against a new university under Order 53, will not be whether the right procedure has been adopted but whether the protection provided by Order 53 has been flouted in circumstances which are inconsistent with the proceedings being able to be conducted justly in accordance with the general principles contained in Part 1. Those principles are now central to determining what is due process."
2) Is any claim barred by Limitation
"Limitation periods generally run from the date when the claimant's cause of action accrues, and a cause of action in unjust enrichment normally accrues at the date when the defendant receives a benefit from the claimant".
3) Should the Court extend the categories of unjust enrichment?
Discussion
"…whether the demand is based on ultra vires regulations, or on a mistaken view of the facts of the case, it will… be a demand outside the taxing power conferred by the empowering legislation." (§22-23)
"At present, it is unclear how far the Woolwich principle extends beyond the core case of money paid as tax that his not due. But if the rule in Woolwich is underpinned by broadly conceived rule of law considerations that extend beyond the "no taxation without Parliament" principle, this suggests that claims should lie not only against revenue authorities to whom money has been paid as tax but also against any other sort of public authority which has acted beyond its powers to exact duties, fees and other levies. It also suggests that the concept of a "public authority" should be given a wide connotation in this context to embrace not only governmental bodies but also bodies such as public service providers and universities whose authority to charge consumers of their services is subject to and limited by public law principles (§22-21)
Ultra vires payments by public authorities – Auckland Harbour Board
"21. Unlawful obtaining or conferral of a benefit by a public authority
(1) The defendant's enrichment is unjust if the defendant is a public authority which unlawfully obtained the benefit from the claimant.
(2) The obtaining of the benefit need not be preceded by a demand.
(3) The defendant's enrichment is unjust if the claimant is a public authority which unlawfully conferred the benefit on the defendant.
(4) The question whether the obtaining or conferral of the benefit was unlawful is to be decided by applying the principles of public law; but there is no requirement that the claimant must proceed by first seeking judicial review.
(5) There are statutory provisions, especially in the context of tax and social security, that govern the right to restitution from or for a public authority."
"21(1) The controlling concept which determines the types of situations, bodies and payments (or in principle other enrichments) to which the Woolwich principle applies, is public law unlawfulness. As developed in cases subsequent to the Woolwich case this can cover the misconstruction or misapplication of a relevant statute or regulation as well as where the relevant regulation is ultra vires and invalid...
……
21(3) A public authority that makes a payment to (or in principle confers any other enrichment on) the defendant unlawfully has a right to restitution. The reason for the restitution lies in the desire to protect the public generally from the spending of funds by a public authority unlawfully. Put shortly, like the Woolwich principle, one is concerned with protecting against the State unlawfulness, although here the unlawfulness is the mirror image of that in Woolwich (i.e. one is concerned with payment out, not payment in). …
Restitution for a public authority was recognised to be 'well-established' in the speech of Lord Goff in the Woolwich case [1993] Ac 70 at 177, with his Lordship there relying on the Privy Council decision, given by Lord Haldane, granting restitution in Auckland Harbour Board v R [1924] AC 318, PC. Although both Lord Goff and Lord Haldane confined the principle to the recovery of moneys paid out of the consolidated fund, in principle the unjust factor extends to all payments made ultra vires or otherwise unlawfully by public authorities. This is now borne out by Charles Terence Estates Ltd v The Cornwall Council [2011] EWHC 2542 (QB), [2012] 1 P & CR 2, in which it was held that a local authority was entitled to restitution by reason of its own ultra vires conduct (albeit, on the facts, restitution was refused in respect of the rents paid by the public authority because the defendant had a change of position defence)."
The Council's statutory responsibility to make the payments
"an often overlooked but crucial element...is that an unjust factor does not normally override a legal obligation of the claimant to confer the benefit on the defendant. The existence of the legal obligation means that the unjust factor is nullified so that the enrichment at the claimant's expense is not unjust..." (Burrows Restatement at 3(6) (page 32))
"However there are some limited exceptions where the unjust factor overrides the claimant's legal obligation to the defendant so as to allow restitution. The explanation for these exceptions is not easy to pinpoint but one might say that they are situations where there is no underlying conflict between the reason for allowing restitution and the defendant's legal entitlement ...
It might help to link of the legal entitlement as being easily outweighed by the unjust factors." (page 33/34)
"Example 7
C pays advance corporation tax under a statutory scheme that is ultra vires the Revenue (D) because contrary to EU law, it does not give C an option to avoid paying the tax by making a group income election. C is entitled to restitution from D (for mistake or under the Woolwich principle) even though (on one technical sense) D was legally entitled to the tax because C had a statutory duty to pay it unless and until it validly exercised a group income election (this fact situation is exemplified by Deutsche Morgan Grenfell v PLC v IC [2006] UKHL [2007] 1 AC 558)" (page 34)
4) Are the elements of a cause of action in unjust enrichment satisfied?
"[62] I am unable to agree that CLBC obtained a benefit as a result of the care Ms. Skibinski provided to Lynn following termination of the contract negotiations. Ms. Skibinski did not provide the care to CLBC. Although Peel and Garland establish that a benefit may be negative (such as an avoidance of an expense that might otherwise have been incurred), this principle is not applicable to the present case. The evidence is that CLBC operates under a budget fixed by government. At the relevant time, there was a waiting list of approximately 40 adults in the Upper Fraser Region in need of various services. It was Mr. Birdi's evidence that "wait lists are necessary because of funding restraints."
[63] It follows that CLBC's not paying for Lynn's care did not increase the amount of money in its coffers, except perhaps temporarily within the current fiscal year. Within its budget, it merely applied elsewhere the money it might have paid for Lynn's care. For this simple reason, it cannot be said that CLBC was enriched by the service given to Lynn by Ms. Skibinski."
"Norah Baker was an indigent for whose care the appellant was responsible prior to Jan 1 1950 when the area in question was annexed by the respondent. The respondent by the act and fact of annexation and by the terms of said Exhibit 11 para 10 assumed responsibility for the social service obligations of the appellant to the residents of the area annexed and the fact that one welfare case was inadvertently omitted from the list cannot permit the respondent to escape the responsibility for that case. To paraphrase Lord Wright it is against conscience that it should do so"
"Unfortunately it was not made clear exactly why there was thought to be an unjust enrichment. Although the unjust factor was obvious – the claimant had made a mistake of fact – the establishment of the benefit is more problematic. The most straightforward view is that Ottawa was under a statutory duty to provide for Norah Baker so that it was incontrovertibly benefited by having that duty fulfilled by Carleton, But the Ontario Court of Appeal had specifically rejected the trial judges view that Ottawa had such a duty. Ottaway's duty may therefore have been a contractual one owed to Lanark..."
6) Change of position
"[315] On balance, …I now think that a better explanation for the bar on the defence of change of position to Woolwich claims is to be found in the stultification principle advanced by Professor Bant and other scholars. In essence, to allow scope for the defence would unacceptably subvert, and be inconsistent with, the high principles of public policy which led to recognition of the Woolwich cause of action as a separate one in the English law of unjust enrichment, with its own specific "unjust factor"."
"It is worth emphasising that while it appears that change of position is not a defence to a public authority under the Woolwich principles (see 23(2)(b)"
"I wish to stress, however, that the mere fact that the defendant has spent the money, in whole or in part, does not of itself render it inequitable that he should be called upon to repay, because the expenditure might in any event have been incurred by him in the ordinary course of things. I fear that the mistaken assumption that mere expenditure of money may be regarded as amounting to a change of position for present purposes has led in the past to opposition by some to recognition of a defence which in fact is likely to be available only on comparatively rare occasions."
"must put it forward "fairly and squarely" in his statement of case so that "its factual merits can be explored at the trial"; he must also adduce evidence and give disclosure in support of the defence. Where it is:
"… based on the incurring of expenditure … after a payment was received from the [claimant], it is not essential that the money expended … [was] identical with the money … received from the [claimant]."
However the defendant must prove, at least on a "but for" basis, that his change of position was causally linked with his enrichment. The courts will make allowances for the fact that a good faith defendant may not keep an exact record of his spending, since he does not expect that he will have to account for his spending to anyone else. But a mere assertion that money has been spent, without supporting evidence, does not suffice..." (Goff and Jones at [27-32])
Conclusion