Well, I thought I'd also help out:
I don't know much about England, but I did my research for you! I found out that Stamford Hill is in Hackney, which is a borough of East London, and is definately part of inner London, meaning access to Mosques is just a drive away, maybe a walk! As Seeker of Ilm said, there is a large Orthodox Jewish community in Stamford Hill, so you'll be in company with excellent people, I know a few.
And to your interest, here was the cencus 'holy' head-count for Hackney:
The 2001 census also shows Christianity is the biggest religion in Hackney, with 94,431 (47%) Christian; 27,908 (14%) Muslim; 10,732 (5%) Jewish; and 6,831 (3%) belong to other religions. A further 38,607 (19%) stated no religion, and 24,315 (12%) did not state a religion