I get ulticarea within 10 minutes of execise if I've eaten bread but my gp refuses to do anything, any suggestions. It is quite unsightly when it happens?

See an allergist. You may have an allergy to one of the ingredients used to make the bread. Food allergy occasionally only causes symptoms with exercise. You may benefit from testing for allergy to wheat, egg, soy, milk, and bakers yeast, among other possible tests that will be decided after a thorough history and physical exam by a board certified allergist.