I've got an interview coming up shortly for the role of postman. However, I've got knee surgery planned for the end of September and the doc reckons it will be 4-6 weeks before I'm fully mobile. As you know mobility is a pre-requisite for a postie so should I mention it at the interview or leave it and mention it only if I'm offered the position? I like to be as up front as possible in interviews but I'm sure if I mention it in the interview then that'll be the end of my career as a postbox stuffer before it's even started.