Skylark 4 it was a Vickers FB5 Gunbus. First aircraft in the RFC with a vickers macine gun. Flown by BAC test pilot Dizzy Addicott who opened the show and had the heck of a job keeping it airborne with gusts up to 30kts. I also remember a beautiful Hawker Hind that was presented to the RAF by the Afghan Airforce during the show.