With the hard tyre having proved unusable during practice at the Spanish Grand Prix, F1 drivers spoke with Pirelli's F1 racing manager Mario Isola during Friday night's driving briefing in Barcelona about the situation.

They asked for Pirelli to steer clear of bringing the hard to races in the future, and wanted a change of plan for July's Silverstone race, where the current options available to teams are for the hard, medium and soft.

F1 teams are supposed to pick their choice of compounds for the British GP by this Thursday, but an agreement has been made for Pirelli to wait until the next days to finalise whether it wants to change its original idea of bringing the hard.

Speaking to Motorsport.com about the situation, Isola said: "The regulations say we have to select three compounds, and at the moment the selection is the hard/medium/soft. The discussion is if we move to the medium/soft/supersoft."

With the Spanish GP having shown that the medium can be a good race tyre, Isola said his belief was that Pirelli could go one step softer for the British GP.

"There is the feeling that we can move maybe one step softer for Silverstone, in that case using medium, soft and supersoft," he said.

"In Silverstone it will be free choice, so it is up to the teams to make the right one and we see. And if we go in this direction we will have more pitstops."