Pension – Pension scheme. Th Chancery Division held, among other things, that, in respect of the Arcadia Group Pension Scheme and the Arcadia Group Senior Executives Pension Scheme, the definitions of retail price index (RPI), applicable in respect of the schemes, operated to confer powers to select an index other than RPI, and that such power of selection was exercisable by the principal employer under the schemes and the trustee of the relevant scheme jointly.