Letter from Francis Bertram, Air Ministry, to WSC, on figures for Pilots' licenses issued in Britain. Stating that 7355 licences had been issued since 1919, and that the increase on the last year had been 1200. There were 2922 current private licences and 512 "public transport". Also stating that the reason why so many pilots did not keep their licence current was entirely financial, as the cost of flying at a club was 2l 10s per hour.