Friday 13 June at 12:52 : Tensions between formula one powerbrokers Bernie Ecclestone and Max Mosley look set to continue for now.

Following the revelation of Ecclestone's latest letter to FIA club members, it now emerges that Mosley this week cancelled a planned meeting with the F1 chief executive.

As reported on Thursday, Ecclestone in his letter plays down the risk of a 'breakaway' series, explaining that he and the teams simply want a new Concorde Agreement.

Until now, Mosley - the embattled but now secure FIA president - has been unwilling to sign up, and it is rumoured that Ecclestone has installed a June 16 deadline for movement on the 68-year-old Briton's position.

Speculation about the ultimatum reportedly follows Mosley's cancellation of an "important" London meeting with Ecclestone, Britain's Times newspaper said.

"Personally Max has been a friend for 40 years and I hope he still is," Ecclestone wrote in his letter this week.