One would suspect so if they have been forced to hand it back! But its hilarious in the face of the following from the 2016 pay review:
A FRI for Army Air Corps pilots, which runs for one year but is backdated to April 2015. The FRI offers sums of £50,000 to £100,000 for up to five years’ ROS (see Army Briefing Note 2/16).
Imagine the conversation with army manning: yes Maj Porpington-Smythe we do want to take shed loads of cash from you because of a mistake we made, but would you like this money to stay in this job where you are valued and supported by highly competent administrators? No?
I reckon they'll go after those who just left too (without success)