Originally Posted by
ETOPS
Possibly something to do with being reformed after WW2 at Leuchars?
In view of 151's Squadron's association with Scotland, it having been disbanded at Qullane in 1919 after World War I, and re-formed at Leuchars in 1951, it seemed appropriate to have new markings for the aircraft.
With Leuchars being in sight of St Andrews, the St Andrew's cross was chosen as the Squadron motif.
The black border round the motif was chosen to emphasise the night defence aspect of its role, for which it was formed in 1918, and in which role it had distinction in World War II. The design for the Squadron markings was submitted for approval and accepted.