I remember the Unit Test Pilot, at Tern Hill and Shawbury, at least from 1975, quite clearly - well, all but his name - Oh, It's just come to me...
Master Pilot Alec Riddoch!
I remember refering to him as "Mister" Riddoch, a term he seemed to like very much!
Often, he would put his Flying Jacket on to do Flight Tests - Not a Flying Suit - Just Blues and his Jacket would do, as he probably needed somewhere to put his Chinagraph. He had a Flt Lt working alongside him, who was obviously tollerated by Alec up to his retirement (though the Flt Lt was quite a good UTP too!).