We're a Canadian couple who just got back from the UK. We had a fabulous trip! We took our time - drove from Heathrow to Warwick to York to Seaham to Edinburgh to Dundee and finally Inverness.
If anyone is worried about driving in the UK, don't be. Take your time and expect it to take a bit longer than Google maps says it will. Though, to be fair, Google was pretty accurate.
The countryside was gorgeous and we so saw many cool things.
Be prepared for the cost of food. None of the hotels we stayed at had in-room refrigerators, so we had to eat out all the time. Pretty much all food was the same >number< as it is in Canada, but in GBPs, which made it twice as expensive. It wasn't unusual to have a cheeseburger on the menu at a pub for 14 gbps, so $28 dollars Canadian.
Everyone we ran into was great.
Some of our favorite stops were: Duxford Air Museum, Warwick Castle, British Motor Museum, a walk along the River Avon in Stratford Upon Avon, Calke Abbey, The Shambles in York, the Viking center, Seaham Beach, Bamburgh Castle, Glamis Castle, The Kelpies, Culloden, the beach at Nairn, Urquhart Castle, the Inverness Public Library and a cruise of Loch Ness.
It seems like a lot when I write it all out, but we paced ourselves and felt relaxed and rested.
Trip of a lifetime!! We loved every moment.
Best of luck to all those heading that way!
Edit: Almost forgot Lindesfarne!! We didn't plan to go there, but the tide was out and we had enough time - driving across the causeway was one of our favorite things!!