“Rule 39 Payment of pensions and lump sum benefits […] 39.6 Any pension … payable to a Member … shall be reviewed annually by the Trustees and shall be increased on the Anniversary Date by: 39.6.1 in the case of a pension for or in respect of a Category A Member or a Category B Member eight and a half per cent (8½%) per annum 39.6.2 in the case of a pension for or in respect of a Category C Member five per cent (5%) per annum 39.6.3 in the case of a pension for or in respect of a Category D Member (other than a pension payable under Rule 18) the greater of five per cent (5%) per annum and the increase in the Retail Index in respect of that part of the pension which exceeds the Guaranteed Minimum Pension and which relates to Pensionable Service after6th April 1991 , and 39.6.4 in the case of a pension in respect of a Category D Member payable under Rule 18 the greater of five per cent (5%) per annum and the increase in the Retail Index if less”
“(C) The Principal Employer and the Trustees agree that Rules 39.6.3 and 39.6.4 of the 1996 Definitive Deed do not correctly reflect the common intention of the Principal Employer and the Trustees when adopting the 1996 Definitive Deed nor the past and present practice of the Plan. The Principal Employer and the Trustees accordingly now wish to confirm and rectify Rules 39.6.3 and 39.6.4 of the 1996 Definitive Deed in the manner specified in this Deed. … OPERATIVE PROVISIONS 1. The Principal Employer and the Trustees declare that with effect from the date of the 1996 Definitive Deed and by way of rectification and clarification Rules 39.6.3 and 39.6.4 as they currently appear in the 1996 Deed shall be construed as if the word “greater” in each case were replaced by the word “lesser”.”
“Conclusion on the law”. “For all these reasons, we are unable to accept that the objective test of rectification for common mistake articulated in Lord Hoffmann’s obiter remarks in the Chartbrook case correctly states the law. We consider that we are bound by authority, which also accords with sound legal principle and policy, to hold that, before a written contract may be rectified on the basis of a common mistake, it is necessary to show either (1) that the document fails to give effect to a prior concluded contract or (2) that, when they executed the document, the parties had a common intention in respect of a particular matter which, by mistake, the document did not accurately record. In the latter case it is necessary to show not only that each party to the contract had the same actual intention with regard to the relevant matter, but also that there was an “outward expression of accord” – meaning that, as a result of communication between them, the parties understood each other to share that intention.”
“… it seems to me that there will be cases, particularly in a pensions context, where it will be permissible to allow rectification when one can say by implication perfectly clearly that the parties did not intend by the Deed they entered into, to effect a particular change, even though they had not stated outwardly to each other (or indeed at all) that they did not intend to effect that change, simply because the change was not in any form discussed.”
“The role of those acting for the representative beneficiary is to satisfy themselves, both legally and evidentially, that the requirements for the rectification sought are met. There is a need in carrying out that role for the investigation to be carried out with rigour, because the representative beneficiary is in effect acting on behalf of a significant number of members. … … once those investigations and enquiries have been made, it seems to me that, whether in response to a Part 8 claim or in response to a summary judgment application made under Part 24 in relation to a Part 7 claim, if those acting for the representative beneficiary have reached the clear and definite view that the representative beneficiary does not, on behalf of those whose interests lie in opposing rectification, have a realistic prospect of defending the claim and that there is no other compelling reason for the matter to go to trial, then it is proper and indeed right for them not to continue to defend the claim. Each case will, of course, depend on its own particular circumstances, and there will be cases in which it is necessary for a more nuanced approach to be taken. There may, for example, be cases in which, because of a significant gap in documentation, for example as to the intentions of a significant number of those who executed the relevant Trust Rules or other deed, it is reasonable and appropriate for the matter to be defended so that it goes to trial so that questions can be asked of those who are available to give evidence. There may be other cases in which, because the application has been made so long after the mistake has come to light, there is a prospect of an equitable defence such as laches being raised. Those are likely to be exceptional cases, but of course each case is potentially different and may require a different approach.”