I have understood for many years that the person responsible for persuading the RAF to move to an 8 gun fighter armament was Air Marshal Sir Ralph Sorley, a squadron leader in 1934. The Wikipedia article on Sorley mentions that Captain Hill helped with the calculations. It's nice that a 13 year old girl was involved and is now recognized, but I reckon that the Sorley would have gotten *someone* to do the calculations regardless. I don't much like journalists bending a story to make it more saleable.