If you have it, you don't need a GB sticker if you go abroad (even though the Gendarme might insist you do!, but thats the french for you!). The GB isn't a standard fit, but can be requested when they make your plates. When we buy a new car we always ask for GB plates to be done and there is no extra cost.
europlate is the official name..., supposed to be for travelling abroad but so many opt for them as they think they look better than the standard plates..
Same as you Hopkirk, yet something else for the eudictaorship to meddle with.
surely it would make more sense for the car to have the flag of the country its come from....oh no how silly of me the eu dont want soveriegn nation identity