Conservative leader David Cameron and Liberal Democrat Nick Clegg have both agreed to take part in a televised US-style debate in the run-up to the next general election.
It follows an ultimatum set forth by head of Sky News John Ryley in The Times today.
Sky News and set up a petition calling for all three party leaders to take part in the first US-style televised leadership debate ever in a UK general election.
So far some 1,400 have signed.
Ryley has said that Sky will make live footage of the debate available to all broadcasters. Although it is likely that the BBC will argue to have its own cameras at any leadership and will want a seat at the table when it comes to agreeing how news broadcasters will deak with such an event.