Sebastian Vettel cited the deaths of two British drivers as the clincher for Formula One ending its historical designation as a fully open-cockpit sport. The four-time world champion spoke after trying out the 'halo' protection system — a carbon fibre guard fitted around the driver's head. Traditionalists including Lewis Hamilton, who called it the 'worst' modification ever in Formula One, see it as being against the spirit of daring. And even some of the halo's supporters admit it looks ugly. 'I agree it doesn't look very nice,' said Vettel after driving with it on his Ferrari during testing in Barcelona on Friday. 'It's not the picture you are used to seeing for F1.
