Tinribs
I am not sure what you mean when you say you are not getting a full state pension After 40+ years of RAF service. Surely you should be getting the basic state pension in full - £107 per week plus possibly a little bit of SERPS/S2P?
The contracted in/out scam starts after the single tier pension is introduced in 2017. For service personnel after 2017, if they have been contracted out all their working career, and have paid NI for 35 years, they will get £144 minus a "rebate derived amount" = £107. For every full year of NI after 2017, they will get an extra £4.11.
Al R. Please correct me if I am wrong.