David Cameron appears to have ruled out taking part in TV election debates before this year's General Election.
In an interview with ITV News Political Editor Tom Bradby, the Prime Minister was asked if he would refuse to join the debates if the Green are not included.
He replied simply: 'Correct.'
It follows a proposal last year by broadcasters ITV, BBC, Sky and Channel 4 that the 2015 debates should include the leaders of the Conservatives, Labour, Liberal Democrats and UKIP.
The broadcasters said that the Green Party was not included based on long term polling and recent election results.
UKIP came top in the European elections in 2014.
The Greens finished in fourth place - but they did beat the Liberal Democrats into fifth.
So, supporters argue, the Greens should have been included.
Additionally, the broadcast regulator, Ofcom, today announced to which parties it is minded to give 'main party' status for the election campaign on the principle commercial channels - and the number of Party Election Broadcasts they will air.
Ofcom says it is minded to give 'main party' status to UKIP but not the Greens.
David Cameron, however, wants the Greens included.
He thinks the Greens are likely to present a similar challenge for Labour and Lib Dem votes as UKIP will present challenge for Conservative votes.
Currently, ITV has proposed a four-way debate involving David Cameron, Ed Miliband, Nick Clegg and Nigel Farage on April 29.
Sky want to host a three-way debate for the leaders of the Conservatives, Labour and Lib Dems on April 15. The BBC debate is scheduled to be between just Mr Cameron and Mr Miliband on April 1.
After the Ofcom announcement today, the Green Party leader, Natalie Bennett said: "The Green Party is deeply disappointed by this draft Ofcom ruling, not only for itself, but for the damage it risks doing to British democracy."
Mr Cameron - at least for his own electoral prospects - appears to agree with his Green counterpart.