Teams could withdraw from the German GP admits Whitmarsh after Silverstone blowouts

McLaren chief Martin Whitmarsh has admitted there is a danger that teams will boycott this week's German GP in the wake of the alarming tyre failures which blighted Sunday's British GP.

Pirelli's investigation into the cause of the tyre failures - McLaren's Sergio Perez had his second of the weekend after the second Safety Car interruption while Fernando Alonso's Ferrari (right rear) and Esteban Gutierrez's Sauber (left front) also suffered - was underway even before Rosberg crossed the line to claim his second victory in three races. The tyre makers have already ruled out the production changes introduced for the Silverstone event - to prevent the delaminations seen at earlier races - being a factor in the debacle. "We can exclude that the new bonding process, which we introduced at this race, is at cause for the tyre failures we have seen today," Pirelli motorsport chief Paul Hembery declared. Among the options expected to be discussed at Wednesday's meeting is the immediate reversion to last year's tyres - a proposal already endorsed by Whitmarsh and his Red Bull counterpart, Christian Horner. Horner and Ferrari Team Principal Stefano Domenicali also suggested that the scheduled Young Driver Test later this month be scrapped in favour of a fully-fledged tyre test, although Whitmarsh has called for a more urgent remedy. "I think something will have changed by Germany," said the McLaren chief. "I'm not considering that [withdrawing] at the moment, it's something all the teams and drivers will have to take a view on, but we have to support Pirelli and make sure we give them all the information and enough time to make the right decisions."