Silverstone circuit, not Pirelli, caused tire failures? (Update)

UPDATE Silverstone organizers have shunned claims that the circuit's curbs could have played a role in the dramatic sequence of tire failures suffered at the British Grand Prix.

Four drivers were hit with left-rear blow-outs during Sunday afternoon's race, including early leader Lewis Hamilton, prompting sole tire supplier Pirelli to launch a full-scale investigation at its Milan headquarters in a bid to uncover the root cause of the issue.

Reports later emerged linking the tire problems to sharp curb edges at selected corners, but Derek Warwick, President of the British Racing Drivers Club (BRDC), brushed them aside as "absolute rubbish".

"Absolute rubbish," Warwick told Sky Sports. "These curbs have been in since 2009 and we have had thousands and thousands of cars go over these curbs and they have been absolutely fine. We have had them checked by the FIA and they conform fully with the FIA."

In the wake of the incidents, Pirelli has been asked to attend the latest meeting of the Sporting Working Committee, taking place at the Nürburgring on Wednesday.

06/30/13 For all that "cutting the corner" may be what the drivers "want" to do, the race course is defined by the white lines so the wheels – and the tires – should not be on that "razor sharp edge". If the drivers choose to drive outside the course then, that is their mistake. They can't do it on most corners at Monaco, for example. It seems a bit odd to ask the tire manufacturer to make a tire tolerant of "off-road" racing.