Thank you very much for your help - I have written to my surgeon and he has now replied and I will be going back into hospital so he can look at my tibia under anaesthetic and may remove the fixator and apply a cast or may leave it in depending on how things look at that time and so this may change my situation. The travel agents have asked the airline and apparently they will let me fly if I still have the fixator but I feel I will let the airline staff on board the plane know in case of any delays etc and therefore problems occurring.