The leaders of Britain's three main political parties - for now, at least - are preparing for the final set-piece television event of the general election campaign.
Conservative Prime Minister David Cameron, Liberal Democrat Deputy Prime Minister Nick Clegg, and opposition Labour leader Ed Miliband will face the cameras and questions from a studio audience.
The leaders will appear separately, and won't debate each other - because David Cameron only agreed to one TV debate before Thursday's vote.
It comes with most polls still showing his Conservatives neck and neck with Labour and Britain heading for a hung parliament.
Joe Twyman of pollsters YouGov says that makes door-to-door campaigning more important than televised events.
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Political reporter Theo Usherwood says the leaders know the event presents a risk and an opportunity.
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