Stibbon, after investigation I agree with you and accept I was in error.
A SP has to claim their pension if it is deferred with the earliest opportunity to receive it being 55. There is a table within the MOD online AF pension calculator which advises what the actuarial reduction would be from 55 through to 66 years of age.
mod-pc.co.uk
also RLFR 2016 states:
03.03.280. Pensions. FTRS is pensionable service. On taking up a commitment SP are auto- enrolled into the Armed Forces Pension Scheme 15 (AFPS 15) although they may opt out at any time. Reckonable service starts on the first day of paid service, irrespective of age. The normal retirement age for the scheme is age 60.
SP who leave before age 60 will have pension benefits preserved until the State Pension Age129 (SPA) unless the SP applies for early payment of pension with actuarial reduction. Ill-health and dependants’ benefits are payable subject to 2 years’ qualifying service. Full details are available from DBS Pensions Division, MOD Website and in AFPS Regulations. SP may apply to transfer benefits from other pension schemes into the
AFPS 15. Any request to transfer benefits must be completed within 12 months of becoming a member of AFPS 15130.