Formula One world governing body, the FIA, have granted McLaren's drivers amnesty should they supply information relevant to the spy saga.

The FIA launched an investigation into an allegation that ''one or more'' of the team's drivers may have been in possession of material relating to the case.

That led to FIA president Max Mosley writing a letter to all Formula One team principals urging them to come forward with any details to substantiate the claim. If the trio have since volunteered any information, the FIA have confirmed they will not be punished.

However, the FIA have threatened ''serious consequences'' - possibly the withdrawal of their Super Licence that allows them to drive in Formula One - should it later be found they withheld information.

In his letter to the McLaren trio, Mosley says: ''You will appreciate there is a duty on all competitors and Super Licence holders to ensure the fairness and legitimacy of the Formula One World Championship.

''It is therefore imperative that if you do have any such information, you make it available to us without delay.

''I can confirm, given the importance of this issue, that any information you may make available in response to this letter will not result in any proceedings against you under the International Sporting Code or the Formula One regulations. However, in the event that it later comes to light that you have withheld any potentially relevant information, serious consequences could follow.''