Hi Allan,
Many thanks for the info and the insight into the 1930s RAF Badge scheme, something that I was not aware of….Always an education on the forum.

Looking at descriptions of the various squadron crests, 201 uses a Seagull..202 a Mallard…204 a Comorant.

Looks sort of Gull like to me…calling Bill Oddie!!

Cheers, Chumpy.