Home Aircraft Depot, Henlow
By 1931 The Home Aircraft Depot, part of the Royal Air Force, was the only unit in Britain entirely devoted to the reconditioning of aircraft and their engines. Also the centre for final training of aircraft riggers and fitters in the service - for this reason a proportion of the repairs and overhauls necessarily arising from the use of aircraft is diverted from its normal route back to the manufacturer's works and taken to Henlow.