Hi mate, good luck with this bud.
My brother lived in North east london for a while in Enfield/Tottenham, he said it's exactly the same as you've described it for young lads around your age (He never got mugged once but he's in his 20's)
As Plan B said in one of his tracks 'NO MORE EATIN FOR YOU NOW BLUD!'
As far as your training goes, I personally wouldn't worry about doing Chest twice in a week.
If you want to do that, train your whole upper body twice.
For example - a 3 day routine would look like:
1) Bench Press, Rows, military press, pull ups, arms
2) Squats, Deads, Front Squats, Hamstring Curls
3) Dips, 1 arm DB Rows, Standing DB Rows, Cable rows, arms
<message edited by Knighty on 26 September 2007 11:53>