As much as I try and avoid Nandos on principle it's just frustrating that you're now forced to pay more for a pitta/wrap if you don't/can't consume milk. They claim it 'makes them softer'.....emailled them too but no reply as of yet!
Adding protein to bread dough does make it more tender, but you can accomplish the same thing by adding other proteins such as soy. I don't know if those things differ in terms of how commonly people are allergic to them though. I'm allergic to milk protein, so I can't get away with guessing.