jlms,
there were lots of married girls and boys on the BA scheme while I was there. Things to bear in mind are; you are almost certainly going to end up in London somewhere, so make sure Mr/Mrs jlms doesn't mind that too much. Also, as Pontius has said, a lot of training goes on abroad. All of the married cadets I know (including me) got around this one by stating a preference when asked which school you want to go to, and we all ended up in Oxford (still had to spend 2 months in the States though). Rumour is one poor sod said at interview he'd go anywhere for training and ended up in Michigan, which his wife did't like.