Ij101 - Thanks for CAP403, just found it in my download folder. This is the CAA document applicable to civil aircraft. For military aircraft appearing at civil displays you need to consult RA 2335 - Flying Displays and Special Events, as modified by any appropriate waivers. My copy came from MoD under foi. It is my understanding that RA 2335 complies with European Law and that RAFAT have negotiated waivers with some but not all European countries to permit rear entry.