The AD Scout, known as the Sparrow was one of the most unusual British aircraft of the First World War.
Gordon Leith explains about unusual aircraft control column grips, better known as joysticks.
In the video you can see how the divers work together for this complex and delicate task. The divers work in teams and rotate every 40 minutes.
The Hampden in the Michael Beetham Conservation Centre, P1344, was built at the Handley Page factory at Cricklewood and was released to service in December
