Yup, I've imported a couple of American cars into UK - and although I live in the USA now, I've just sent 4 motorcycles over to England and am quite familiar with the paperwork requirements.
What are you thinking of importing? Maybe I can help you track down what you are looking for (I'm in central FL, so lots of nice rust-free cars and bikes here). Is this for personal use or to sell on?
I'll help you if I can.
Matt