I have lived there also for the past 20 odd years. It is actually a fantastic place to live but like most parts of London there is a tiny dark side which I think Ellie addresses very well in her post.
This is the second link to blogs by Ellie this week. Check out her thoughts here on a recent visit to Israel and Palestine.
The rather graphic picture above is the "official movie" poster for the film. I think it partly depicts the two tower blocks overlooking Wanstead Flats in Leytonstone rather than Forest Gate. One of which is the Fred Wigg tower which may hoist anti-aircraft air to air missiles during the Olympics.
Ironically I use to live and work in Edinburgh in the middle/late 1980's. Is this film a 2012 "Trainspotting"?
Update: Sunday Times yesterday refers to the film being set in Forest Hill not Forest Gate!