Highlights from Duxford’s fifth Flying Day of 2021, with a focus on 19 Squadron – the first RAF unit to receive the Spitfire. It was appropriate, therefore, the IWM’s Spitfire Mk.Ia was one of the highlights of the flying display, along with P-51D Mustang “Miss Helen”, representing another type used by the squadron. We’ll take a look at the evolution of competition aerobatic aircraft over the last half-century, but the most unusual participants of the day are a pair of US Air Force F-15E Strike Eagles and a very rare performance indeed by a Nanchang CJ-6.