Rebel bosses hand ultimatum to Mosley

In a response to Mosley's letter of February 24, the team bosses have restated their belief that the FIA is in breach of contract, but told Mosley that they do not wish to be drawn into a public dispute.

The letter, which was circulated to the world's media, said: "We made our position entirely clear in our letter to the FIA of February 20. We believe that the FIA is in breach of contract, we disagree with a number of the changes you have imposed and we are concerned that the F1 Technical Working Group members have expressed a view that the changes could increase the safety risk.

"In the event that the FIA does not confirm that they will seek the agreement of all teams with respect to the recent changes to the Technical and Sporting Regulations that they intend to introduce by close of business today, we will commence Arbitration proceedings under the Concorde Agreement which will resolve these issues in a confidential and dignified manner."

The bosses end their letter by vowing that they are committed to Formula 1 and remain willing, without prejudice to their legal position, to have a formal and private meeting with the FIA for further discussions.