In October 1991, Nigel Mansell was on the brink of losing the World Championship having had a comfortable lead and certain victory thrown away by another pit lane drama in the Portugese Grand Prix at Estoril. He lost one of his wheels after what appeared to be a smooth and tidy pitstop and was later given the black flag. The next stop after Portugal was Spain, but this time the venue was not Jerez. The F1 circus was about to visit a brand new purpose built circuit near Barcelona, the Circuit de Catalunya.