UK Metal pressed plates are 100% legal, there is no need to blag anything and the police can't do a thing to you for having them.
Avengedslayer, your car is DG like mine, so the blue side wouldn't look right, however on a blue car, or even a white car, it would look okay, but without FTW with DG 
for a pressed plate to be "100% legal" they need to have a dealer and a post code at the bottom, a GB flag on it, the correct spacing, the correct font and reflectiveness. as far as im aware dubmister are the only people who do properly legal pressed plates.
sorry mate but now all pressed plates with some letters and numbers are 100% legal. doesnt mean the fuzz will mind though. ive got theoretical illegal pressed plates because they dont have the post code at the bottom but in the 9 months ive been running them i havnt been pulled.