Don Coyote is right in that the crew jump seats can only be used by people travelling on BMed concessions (not just cabin crew).
Flying wise[B]- I remember that incident in Bey, The Captain thought you were travelling on those priviliges, and when told by the groundstaff that you were BA, he had no option to deny you. A BA skipper would have done exactly the same. It's not him that is the 'vvanker'. It's not you that gets suspended is it?.