Just a thought, you are going to be doing a lot of driving... are you familiar with how roundabouts work?

Reason i ask, is we have tons of them here and i didn't see one in 3,000 miles driving around the USA. Just give way to the right.
Also, beware of these: -

These robotic machines will gladly drain your money if you go too fast. The all have to be painted yellow by law, so can't miss them.
And these: -

Who tend to hide behind bushes, wait for you to park illegally, then give you a £60 fine. Also, here we have number plates front and back, so you can reverse park into spaces, also can park facing oncoming traffic if you want.
Also, our roads are really busy compared to the USA so expect a fair bit of traffic, especially around the big cities.