Number plates

[Hog]

After getting my Fabia VRS reversed into by a twat in a Freelander, the bodyshop have done a sterling job but replaced the Euro style front plate with a boggo standard one.

So I think I'm going to treat the Fabia to some new plates.

Question is what are the rules and where's best to go? Assuming I'm going to be ordering off the net that is. Don't want to be falling foul of the rozzers either.

Cheers for any advice.......