There are a lot of British/English films that I'm ignorant to, but I'm slowly working on it. I think I'll just pick and choose from your guys' lists what I liked and assemble my list that way. Keep in mind I haven't seen many:
Shaun of the Dead
Hot Fuzz
Dead Man's Shoes
The Descent
A Clockwork Orange
In Bruges
Trainspotting
Children of Men
That's all I got, hopefully these all count.