Google "jane langford pension" - a lady who fought the system and won a pension - her partner was a One star IIRC who died in service and they tried to cut her out
A good place to start. This is the case to which
O-D refers in his post No 7.
He was Chris Green, Station Commander and Commandant at Cosford and died in post; Jane had been a much liked and respected Station Commander's "wife" during his time there. He was a top bloke too.
There was a further complication; IIRC for some reason Jane had never actually divorced her first husband. This was a sticking point for some years, but she won in the end.