Hey there!
I'm originally from MN. I lived there until mid 3rd grade and then we moved to Colorado where I lived for the next 20ish years. I miss the Colorado weather! I've been here in the East Midlands for 2 years now.
I just wanted to say, even though you are an anglophile, be prepared for culture shock. You may love everything you've read, seen, and experienced from the UK up until now, but that can be very different than what your day to day life will be. You'll probably have culture shock again when you go back to the US after your 2 years here. My best friend did a semester abroad in New Zealand and had it going both ways. She really struggled for a few months after coming back to the US.
Did you guys know that you are only eligible to drive in the UK for 1 year from the day you enter on your US license? You will have to take and pass the UK driving test (theory and practical) to continue driving after that. You may find it easier than I am, but I'm really struggling.
Be prepared for it to take a bit of time for you to find a job. You might be lucky and get one right out of the gate, but a lot of the time not having any UK work experience can really affect your chances. You might want to find someplace to volunteer while you are job hunting, that always looks great on a CV.
Oh, CV's have some major differences from a US resume, you'll want to get some help putting yours together. UK employers really do want you to include your hobbies, which still seems weird to me!
You may already know all of this, but just in case.