Here is a link from the BBC News website about group of young millionaries who flew for the RAF during World War 2. In the mid 1920s the Chief of the Air Staff developed the idea of small auxiliary squadrons that could be called up quickly during times of war. One of the first such squadrons created was the 601. According to stories the squadron was formed in an exclusive gentlemen's club from the young men there who could fly. Despite their wealth and privilege these men were called up into service just after Great Britain declared war on Germany in 1939. The men saw heavy action and sadly some of them died. It is an interesting story and I highly suggest reading it.