Many thanks for the reply.
Is the same true of a prospective spouse/partner visa? I'v just realised i put spouse visa in the post but we are not yet married. According the the prospective spouse/partner visa i will have the visa for 2 years and if the relationship is still genuine etc then i will be given the visa permanently...Would this also mean i could work as a pilot for the initial 2 years and from then on also?