The grey clouds glowering over Istanbul on Thursday seemed to match the mood in the paddock ahead of the Turkish Grand Prix.

If Monte Carlo's sunshine signalled an entente cordiale between the sport's governing body, the FIA, and F1 Teams' Association (Fota) over the future of the sport then Turkey's damp weather brought more confusion and uncertainty.

At the Monaco Grand Prix, it appeared that FIA president Max Mosley was prepared to give ground on his plans to impose a 45m euro (£39.6m) budget in 2010.

It all seemed to be agreed; the teams would continue to compete under the existing rules and would be able to spend up to 100m euro (£87.6m) next year with the full cap introduced in 2011.

Mosley was also understood to be ready to sign a new Concorde Agreement - or at least an extension to the one that expired in 2007 - which would give the teams more say in how the sport is governed.

In return, the established teams offered to share knowledge with any new outfits entering next season.