On August 20th 1932, Cobham's Flying Circus, which sought to popularise the aviation industry, held a barn storming event in Plymouth. The photograph above shows Martin Hearn standing on top of an Avro 504K at Roborough aerodrome. The planes were provided to Cobham's Flying Circus by the CAC (Cornwall Aviation Company) who were based in St Austell. The picture below shows Martin Hearn on an another wing walking escapade the following year.