Former prime minister Tony Blair has said Britain's exit from the European Union can be stopped as his predecessor Sir John Major issued his support for a second referendum.
Mr Blair, who has previously called for Britain to keep its "options open" over Brexit, said the process can be brought to a halt.
In an interview with the New Statesman, he said: "It can be stopped if the British people decide that, having seen what it means, the pain gain cost-benefit analysis doesn't stack up."
The three-term Labour leader added: "That can happen in one of two ways. I'm not saying it will (be stopped), by the way, but it could. I'm just saying: until you see what it means, how do you know?"
His comments came as the man he succeeded in Downing Street warned against Brexit being dictated by the "tyranny of the (52%) majority" who voted for Britain's exit in the EU referendum.
In his first intervention in the debate since the June 23 vote, Sir John told guests at a private dinner that Parliament, not the Government, should make the final decision on any new deal with the EU.
He added there was a "perfectly credible case" for a second referendum.
"I hear the argument that the 48% of people who voted to stay should have no say in what happens," Sir John added. "I find that very difficult to accept. The tyranny of the majority has never applied in a democracy and it should not apply in this particular democracy."
A spokesperson for the current Prime Minister reiterated Theresa May's commitment to delivering Brexit and rejected Mr Blair's assessment that Brexit could be stopped.