'M' with 1417 Flight in September 80
I was on 1417 flt jan to aug 80. At that time we kept the letter allocation from the previous unit The blue 'M' is from 233 ocu.
I was also on 3 sqn up to March 1985 so may have worked on it then.
Found some more info,
Harrier GR.1 XV752 233 OCU '52', Wittering May 1971
harriers
BAE Systems Harrier GR3, 9075M / XV752 / B, Royal Air Force Cosford
BAE Systems Harrier GR3, 9075M, Royal Air Force
if you do get the unit history please post it here