My D22 is a creative writing major and was looking at going to Scotland or England or Wales for awhile. She ended up staying stateside, and is going to do study abroad in London this spring. Study Abroad could be a good way to get some of that Edinburgh/Scottish/UK experience without going to school here full-time.
But if you really have an interest in going to the UK you could also look into UEA in England. They have very well known writing and film programs. In England you usually can’t really major/minor like you can in the US, though, so you’d probably need to pick.
The Scottish universities allow a little more flexibility, but nothing like studying in the US. Strathclyde in Glasgow might be worth a look if you are interested in Scotland. There are also other universities in Edinburgh if you want to be there.
The UK universities have completely transparent admissions policies and basically if you get the scores you are most likely in. You do have to report all scores, though, so make sure you do well on your APs – that is what they look at in comparison to their A-levels. If you bomb one you still have to report it, unlike in the US where you can just leave that off. They may or may not want SAT scores. I can’t remember, but you should look it up, on their websites.