The FIA has now apparently told all the teams with cars in the top 10 that they have to start with the tyres on which they qualified.
Earlier this morning Red Bull, McLaren and Toro Rosso had been told that they would be allowed to fit fresh front tyres in the light of blistering in Q3 yesterday, the teams having cited safety grounds.
However other teams were not happy with that decision and new evidence has emerged over the course of the morning. It seems that the FIA believes that the problem was generated by the extreme cambers run by those teams and that there is no inherent safety issue with the Pirellis.
It seems the team also asked if they could change cambers, but that can only be done if they drop out of parc ferme and start from the pit lane.
Christian Horner and Adrian Newey spent much of the morning in discussion with the FIA, while among those known to have registered their opposition are Force India and Williams.
The problem that the teams now face is that they are stuck with those camber settings and every set of tyres will face the same fate…