Teeters
I recall Darkie Holroyd from Church Fenton, second half of 1969, when I passed through there on a HSP course (forget the number); he tried to teach us navigation, among other things, and I remember him as quite an intimidating character.
Another instructor, civilian met man, was known as "Brian the Snail" (Magic Roundabout reference), partly because of a passing resemblance to the gastropod and partly beacause he was a bit slow (in his subject delivery).
Mister B