No, you can't have a twelve-inch BMT!

How about this for a brilliant - if somewhat non-PC - idea?  A school in Manchester became aware that a lot of its sixth-formers were going to a local Subway branch at lunchtime, so what have they done?  They've invited Subway to open a branch in the school!  This way of course, they can exercise some control over which subs are on offer and promote the more healthy ones.  Rather like that story of the school which took its pupils down to the local pub for lunch, it seems such a good idea that you feel it's inevitable that some jobsworth will step in and put a stop to it.