Sep.25 (GMM) Red Bull is working to win back its second to last paddock curfew 'wild card'.

With the race weekend schedule skewed for the Singapore night race, several teams - Toro Rosso, Mercedes and Virgin - have this weekend lost one of their four 'wild cards' for the season for working in the paddock outside the allowed hours.

Toro Rosso's indiscretion was because boss Franz Tost jumped a queue and swiped his paddock pass just before the curfew was set to be lifted.

And for Mercedes and Virgin, it was a misunderstanding, with those teams forgetting that marketing staff are also subject to the curfew.

According to Germany's Auto Motor und Sport, Red Bull's is a slightly different story, and significant because - with five races still to run after Singapore - the team has now used all but one of its curfew jokers.

"Nothing is finalised," said team consultant Dr Helmut Marko. "First we have to find out who it was."

The German report said it believed the person who actually cost Red Bull the Singapore wild card was someone with a team guest pass.

Auto Motor und Sport said: "Red Bull is trying to clarify the matter with the FIA in order to not lose the wild card."

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