May 7 (GMM) Pirelli boss Paul Hembery is calling for a rules rethink regarding the supply of wet tyres to formula one teams.

McLaren limited its running almost entirely in Friday's rain-affected morning practice session in Turkey, amid weather reports that the bad weather could stick around all weekend.

In fact, qualifying at Istanbul Park is expected to be dry, but Hembery told Auto Motor und Sport that if a race weekend is entirely wet, teams are likely to run out of wet tyres.

"I know there is a rule, but in this case, we needn't be more catholic than the pope," he is quoted as saying.

"If there are three days of rain it would be tight," added Hembery. "The teams would be for it (a rule change) and surely the FIA as well.

"F1 would look pretty ridiculous if drivers have to retire from the race because they have no tyres left," he said.

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