I flew XL623 a couple of times at RAF Brawdy:
23 Jan 1976 - Convex 2 (1:00 with 4 landings) - then solo in an F6A in the afternoon.
After finishing TWU, I was posted to 58 Sqn at RAF Wittering, but the squadron disbanded before I could fly with them, so back I went to Brawdy. 3 months of flying Hunters in the summer of '76 - what magic!
3 Sep 1976 - LL Nav / GH (0:50 with 3 landings). During that trip we heard another Hunter T7 return to Brawdy deadstick with an engine failure - which landed successfully. That was my last T7 trip, although I also flew some T7A and T8B trips at Honington that Autumn whilst struggling with the Bucc course - unsuccessfully.
Good luck with your project!