Hi Ian,
For the physical shipping etc, have a word with Kingstown Shipping. They seem to have a good reputation and know their stuff as regards getting a car here. Assuming it's basically a "stock" car, you should pay VAT of 5% of the purchase price. If you know you need parts, fill the boot up with them
As for the MOT, as you may know, the rules are soon to change for tax exempt vehicles that are "stock". AFAIK, this means that they will not need an annual MOT and rely on you to keep it in good order. Which to me sounds like a field day for unscrupulous lawyers. I'll continue to get mine MOT'd. Non-stock cars will need BIVA type approval so go easy on modifications: converting to RHD will very quickly get you into BIVAs hands
So assuming it arrives in the UK, you do need to trailer it somewhere (can recommend FlyingBlueDog transport for this) and once you've done the required bits, I think the process is effectively an MOT and getting it registered with the DVLA. As local offices are not as common as they were, this is not as easy at it was (ie, tough to do in person)
Here's the DVLAs take on the process
https://www.gov.uk/importing-vehicles-into-the-uk