Photo: UK Government/IWM/Wikimedia • Believed to be in the Public Domain (Age - Crown Copyright expired)

Squadron Leader D.O. Finlay, the Commanding Officer of No. 41 Squadron RAF and former British Olympic hurdler, standing by his Supermarine Spitfire Mark IIA (P7666, EB-ZObserver Corps, at Hornchurch, Essex.

Spitfire Mk IIA, P7666, EB-Z, "Observer Corps", was built at Castle Bromwich,

and delivered to 41 Squadron on 23 November 1940.

Source: wikipedia.org