According to the School Food Trust the rising levels of obesity in the UK are being fuelled by the ready availability of fast food near schools.
(They've even compiled a list of the worst offenders:-
1 Brighton and Hove there are over 46 takeaway outlets and sweet shops per secondary school.
2 Blackpool 40.63
3 Kingston upon Hull 40.00
4 Reading 39.17
5 Middlesbrough 38.33
6 Manchester 36.95
7 City of Bristol 36.94
8 Inner London 36.66
9 Newcastle upon Tyne 36.21
10 Gateshead 35.00)