May I suggest that you exhaust all other forms of negotiation or arbitration before you embark on the courtroom drama bit.
I also suggest that you join or consult the Forces Pension Society and speak with Lt Cdr David Marsh at that organisation. You should also make sure that there are no time limits relating to any action you propose so that your claim is not 'struck out' as time barred.
RAF News (hiss, spit etc etc etc) and Soldier magazine often contain adverts from the legal profession. Your station library may have copies of a magazine called: The Pennant, which also contains adverts of the sort you seek.
Old Duffer