Speculation on a change of champagne sponsor after yesterday's French Grand Prix were premature according to Olivia Arnold, Marketing Assistant for Mumm champagne. The 'odd looking bottles of champagne' I spotted being handed to Kimi Räikkönen, Felipe Massa and Lewis Hamilton were a result of French Law.

"French Law does not authorise us to do any advertising on TV", says Olivia, "therefore we had to get rid of the label. We are still sponsoring the F1 Grand Prix even in France."

Mystery solved - the unbranded bottles handed out on the podium were "definitely G.H. Mumm champagne."