Companies who help to bankroll Formula One motor racing are limiting their involvement in the Bahrain Grand Prix this month, saving some of their marketing dollars for less politically sensitive races. The grand prix was cancelled in 2011 following a bloody crackdown on a pro-democracy uprising, but sponsors were left squirming last year when the sport’s rulers ignored calls by campaigners in Bahrain and abroad for teams not to race, while police and youths staged nightly clashes with teargas and petrol bombs. [article refers to Zain, Vodafone, Diageo, Gulf Air, Shell, UBS]