Ah! Easyflyer - as we are flying with your airline perhaps you can advise??
Anyway, the wrist is broken in an odd place (more a chip at the base of the hand then the wrist itself I understand) so no need for a cast; just a sling for a couple of weeks and it should heal itself by then. We are obtaining a letter from the doctors to say he CAN fly. If not we are are going to cancel.