Warwick does an amazing English Literature and Creative Writing course. I've not been disappointed in the least bit. The balance is good, the staff are amazing and helpful and there's designated writing space, which I don't believe many Universities have. On top of that, it's a high ranking University so should help you gain employment in the future.
UEA also does an English Literature and Creative Writing course and a world renowned Creative Writing MA. The balance of the course is quite different to Warwick's I believe, so your best bet is to look at the websites and compare them to see which you prefer!
Birmingham offers an English Literature and Creaive Writing programme but it's less competitive than the other two and a less gruelling application process. Birmingham gave me an offer just based off my UCAS in about a month. My Warwick offer came through in March-April after sending a 17 page portfolio and having an interview. So it depends if you want something that's potentially more relaxed. I did really love Birmingham on the open day, it had an amazing atmosphere and ended up as my insurance choice.
If you have any questions about the Warwick Eng+CW course, feel free to ask away, but I don't know all that much about the others unfortunately!