They've had the toughest possible lesson in what legislating way out of the Assembly's comfort zone feels like, and if there was a vote tomorrow on whether to make it law, I wouldn't be in the least confident that it would pass.

BBC: Real life and law making collide

Wrexham councillor Arfon Jones petitioned the assembly last year calling for an exclusion zone that would also stop takeaway vans trading near schools.

BBC: Wales' top doctor proposes fast food ban near schools