When a child is in school their well being is the schools responsibility. The schools decide whether to impose a ban.

Unfortunately a severe nut allergy is only controlled by avoidance or daily epi shots and casualty visits.

As I stated before schools do not want even one childs education disrupted by not being in the classroom. They do not have the resource either to lose a member of staff to take the child to the casulaty department in the required 15 minutes following the shot.

You are correct that allergies are on the rise. The reasons behind the increase has been attributed to a number of factors. Take your pick as there is no definitive answer. Awareness is also on the rise. Measures to prevent needless child fatality are also on the rise.

A very good point was made above regarding the smoking ban. Fifty years ago that would have been decried as ludicrous, stifling our rights, unworkable. Times move on and some folk do and some folk don't.