my eldest got pulled on his first outing on his Harley spotted on a roadside census, because he had a blue GB on the side of the plate. bike cop said he wouldnt have bothered but as they picked it up he had to warn him. new plate and a diversion to Melksham Nick, opposite side of the county for him. As WB says fit at your peril, expect to attract attention to yourself. hence , when advertising on the likes of ebag they are advertised as SHOW PLATES, inotherwords not legal.