As Barksdale Boy said, Fred was an instructor at 1ANS, in my case early '67.
In the late 70s I saw him from a distance at LATCC West Drayton and assumed he was by then in GD/Ground branch as either an ATCO or Fighter Controller.
In the late 90s I was at a party at a friend's house in my village in Somerset and met Fred's daughter, who was working then for my friend in his advertising agency in Bath. Fred was 'still on the perch' then.
He is named in an old Retired List that I have - born 1931, Flt Lt 1957, retired from GD (G) 1978.