when i was in the uk in 97 i priced up bringing back a car
it was 5k then just for transport, i don't think it's really that viable

also car deteriorate really really quickly there, i'm talking 3 year old cars getting serious body rust.

look into it when you're there but seriously you are better off finding yourself a decent sub 1000 pound run about that is light on fuel drive it while you are there then sell it for whatever back to a dealer before you leave. insurance will also be difficult for you to get unless you have relatives or very good mates that will be prepared to put you and your car on their policy. Insurance is also mandatory there.