I also saw Charlie Brown and his Spitfire, and yes it was a Mk V, at this year's "The Spitfire Prom" held at Belton House, Grantham on the 12th July.
Brilliant choreography, or pure fluke though I prefer to believe the former
Certainly at Belton House it was the former, brilliant choreography, as a colleague of Charlie Brown, standing a few feet away from myself, was in constant radio communication with Charlie throughout the display and had a young lady standing next to him with the music scores.
It was a wonderful display centred around Belton House and the music "played too" were "The Battle of Britain March", "Calling all Workers" and the "Dambusters March". All very moving and nostalgic.