In 1991 a Jaguar Intercontinental Challenge featuring identical XJR15 cars was held as a support race for the following three F1 races:
Monte Carlo GP - Monaco - 11 May
British GP - Silverstone - 14 July
Belgian GP - Spa - 25 August
Armin Hahne won the series. Why were there only three races in the series, and why wasn't there a series held in 1992?