6.—(1) “Retained benefits” means the total of any pensions, including the annual equivalent of any lump sum, payable to the participator—
(a)in respect of employment before the participator entered pensionable employment, under a retirement benefits scheme or under an annuity contract falling within section 431 (4)(d) of the Taxes Act; or
(b)under a retirement annuity contract or trust scheme approved under Chapter III of Part XIV of the Taxes Act; or
(c)under a personal pension scheme.