Follow your dream.
European law dictates that employers, including airlines, cannot discriminate on the grounds of weight alone. I work for BA, though not in recruitment. Recently I was at our recruitment centre when new people were being assessed. It seemed that BA ask you to sit in a jumpseat and fasten the safety straps. If you can do this you are not 'overweight'. I'm male and 15 stone ...... a bit is muscle honest......... and I fit into the jumpseats on RJ100's, B737's, B757's, B767's B777's and B747's. Go for it.... nobody wants an dull stick when a real person is much more fun.