Courtney, The failing was in the system at the time of how to achieve MAR. The rules stated that the authority should seek "best advice". Historically this had been from Boscombe Down. On many occasions their advice has been proven to not have been the best available. One would not what something that is dangerous to be introduced into service, however, the TPs and their advisers do seem to have been at the forefront of the risk adverse Air Force that is present today.