The 2013 Avon Tyres British GT season was the 21st season of the British GT Championship. The season began on 30 March at Oulton Park and finished on 6 October at Donington Park, after ten rounds held over seven meetings.[1] Beechdean Motorsport team principal Andrew Howard won the GT3 category in an Aston Martin V12 Vantage GT3, Optimum Motorsport's Ryan Ratcliffe and Rick Parfitt Jr. won the GT4 championship, driving a Ginetta G50 while Paul Bailey and Andy Schulz took the GTC title in a Ferrari 458 Challenge, driving for Horsepower Racing.