One of my bosses in the FC Branch was Nick B*****y, ex-Lightning pilot. Grounded himself as a Flt Lt, but rose to (at least) Gp Capt as an F.C.
His story was that he was becoming more and more nervous about his flying and the, when on QRA, found himself passing 5000ft in the climb withoutout being able to recall anything about how he got there from the shed.
Once he got back on the ground he went to see his Sqn Boss, explained he couldn’t do it any more and handed over his wings. They tried to persuade him to take some time off, see the medics etc, but he stuck to his guns and never, as he claimed, regretted his decision.
p.s. Just doing some research to see if he is still around, I see he was at the 2014 WIWOL reunion. Aged well if hair very white....