Sad news - Clem was a senior Nav on my first Sqn (LXX) in the 90's and one of those who, despite his initial gruff exterior, took us junior Navs under his wing. I still recall his face (and choice use of words) when he was screening me on my first Para-Wedge sortie and I called "cut" a little too early resulting in DZ score of "one and a half miles at 6 o'clock" thereby joining the infamous Para Wedge 3 (along with Tommo and Veggie). I last met your dad when I was on the staff at Cranwell and therefore assume it would have been at your graduation? A true Gentleman aviator - my condolences to the family - "Per Ardua".