I will get back to you after the weekend then. We have the annual staff BBQ this Sunday so all the Marshals should be there, they will probably be fairly w******d but I should be able to find out where he got the hat from.
Ref's seem to be known for their odd hats, one of my local refs has bunny ears and myself soon to adorn a tri 'earred' hat, well it has weird flap things hanging off it, more like rave wear if anything