Only reserve service which counted in AFPS 75 (prior to 6 April 2005) or in RPFS can be counted. For the former you had to have left with an immediate or preserved AFPS pension and been called out for a national emergency or mobilised under S32, 43,52, 54 or 56 or the Reserved Forces Act 1996 (or corresponding section of the 1980 Act). For the latter the provision of the 1996 Act apply.
In 2006-ish the MOD fought and won a prolonged legal challenge about the non-pensionable status of reserve service which did not meet the above test and I cannot see them conceding now that it can count for pension.
Readers who want their position under the new scheme setting out for them in plain language might like to visit the Forces Pension Society website (
Forces Pension Society - Fighting for the Forces and their Families) and join us on line. Our Help Desk is experienced in demystifying pensions for our members and, of course, having been closely monitoring the development of the new scheme, understand what is proposed.