Denham Aero Club Auster J/4 G-AIPS can be seen in the photograph of the line-up. Six days after the BOAC Sports Festival (9.6.51) it was written off at Denham after a stall (15.6.51). That might help with dating the photograph. This particular Auster suffered at least 5 notified accidents in its short working life of just under four years.