Amid rumours of a continuing deal with Renault, Red Bull Racing boss Christian Horner says a decision about the team's 2010 engine supplier is now ready to be made.

Mercedes-Benz's exclusive F1 partner McLaren vetoed Red Bull's preferred deal, leaving the Milton Keynes-based team weighing up either staying with Renault or switching to Cosworth.

"We believe we have all the facts in front of us now and we will be looking to make a decision pretty much imminently," said Horner.