Pirelli attributed blame to the teams mounting the rear tyres the wrong way around, running low tyre pressures, using extreme cambers - the angle at which the wheel is mounted on the suspension - and what it described as "high kerbs" at Silverstone.
Mercedes director of motorsport Toto Wolff refused to be drawn on the subject.
"I don't think you can expect any tyre supplier in the world to say their tyres are not safe," he added.
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