Put it this way, I was rejected from UCL for English this cycle due to my poor GCSEs (9A 2B) although I know for a fact my reference and PS were excellent (admissions tutor from KCL told me so, that's not me being arrogant even though it sounds it!). I also received offers from Nottingham and QMUL without any predicted grades (yeah, my college doesn't believe in proof reading applications apparently!) so I'm not exactly a poor applicant yet I still got rejected because of GCSEs that I did almost 5 years ago now.
So I'd be careful, don't pin your hopes on it. Saying that, no one should really when it comes to UCL English, it's very very VERY competitive.
Edit: If it helps I got AAA at AS with extenuating circumstances with a 92% UMS (?) in English. Again, not bragging just letting you know the circumstances under which I got rejected.
Good luck!