At least that's what the Times blog says.
4.15pm Brown quits, reports Standard
The Evening Standard is reporting that Gordon Brown is to quit tonight and David Cameron to be Britain's next prime minister.
"Gordon Brown is set to resign tonight and allow David Cameron to be Britain's new Prime Minister," they report.
"The Labour leader's final desperate attempt to cling on to power with a Lib-Lab deal crumbled amid a rebellion on his own side and policy disagreements with Liberal Democrat leader Nick Clegg.
"This afternoon he retreated to No 10 to discuss his situation with senior ministers, friends and wife Sarah.
Mr Brown had planned to stay in power until the summer if the deal had worked, earning himself a place in history as the man who won a historic fourth term for Labour."