The BBC has scrapped its plans to hold a Brexit debate between Theresa May and Jeremy Corbyn.
In a statement the organisation said it was “disappointed” an agreement could not be reached on the terms of the debate.
Labour had earlier formally rejected the BBC’s proposal for the discussion, calling it a "mish-mash" and accusing Mrs May of dodging a head-to-head debate.
The BBC had said it was keen for the programme to include other voices.
Downing Street backed this proposal, while Labour said it preferred ITV as a host.
The debate between party leaders was due to take place on December 9, two days before MPs are due to vote on Mrs May's Withdrawal Agreement.
In a statement, the BBC said: "We are disappointed that we could not reach an agreement on the BBC's proposal for a debate on Brexit.
"We have been clear throughout the whole of this process that, as well as a substantive head-to-head debate, any programme we broadcast would need to include other voices, including other political parties, to reflect the wide range of views the public and parliamentarians hold about Brexit.
"The final proposal we put to both of the main parties was for a head-to-head debate between the Prime Minister and the Leader of the Opposition, followed by a discussion between eight panellists, including politicians, with a wide range of views on Brexit, and ending with further head-to-head debate and closing statements.
"We believe ours was a fair and appropriate format for those taking part and, crucially, for our audiences around the country, and it is a shame we will not be able to bring them this programme."
The broadcaster added that it would keep audiences informed with news coverage, analysis and other programmes including a Brexitcast "takeover" of The One Show.
Labour earlier described the BBC's proposal as "a lopsided panel of other politicians and public figures, not a straightforward head-to-head debate".
A Labour source said the party's message to Mrs May was "come and join us on ITV".
On Monday, the prime minister expressed concern that she would miss Strictly Come Dancing if the debate was held on on ITV.
Mr Corbyn last week complained on This Morning that the BBC's proposal would clash with jungle-based reality show I'm A Celebrity, Get Me Out Of Here!
