It is the RAF's 90th birthday. My grandfather was there at its inception. He had gone to France in 1914 as a private soldier in the British Expeditionary Force - an Old Contemptible. He then transferred to the Royal Flying Corps, first as an observer and then getting his wings. He ended up commanding RAF Hornchurch, flying Spitfires, and with a rank of Group Captain - not bad for someone who started on the bottom rung. Two of his sons also flew - one was shot down and killed flying a Halifax, another was a fighter pilot who went on to reach Squadron Leader rank in the regular Air Force. My father had poor eyesight and ended up in the poor bloody infantry... Happy Birthday RAF.