Sussex police did have berets back in the very late 1990s, worn by traffic officers on motor bikes.
Was a black beret with a Q/C EIIR chrome cap badge that had been painted black.
The idea was the officer could pop it in the side box on the bike, instead of having his flat cap in there and this would get bent out of shape. Thus a beret was used for a very short period of time. No longer issued, as officers didnt like them.
Thanks for the information, bank holidyas being what they are I've spent some time doing research and found a few forces do/did at some point issue them for firearms and dogs
thats the first time I've heard of traffic issuing them seems a good idea to me