What is it?
The 2011 British science fiction comedy horror movie Attack The Block.
I am the only person I know who saw this movie years ago at home, it is low-budget, but it was actually better than I had expected.
This movie took some annoying young people / gang members & gave them some character development by having them come together to help save their community against a surprising threat.
John Boyega did a good job in his role, and this was the first movie that I ever saw him in.