By Tim Sculthorpe, Deputy Political Editor For Mailonline
Published: 10:52 BST, 15 April 2019 | Updated: 09:24 BST, 16 April 2019
Tony Blair and Bertie Ahern issued a joint call for a new Brexit referendum today warning leaving the EU was the biggest threat to the Good Friday Agreement.
The former leaders of the UK and Ireland said the peace plan was based on talks between both sides confirmed by public votes - proving the case for a new referendum on Brexit.
While insisting there was no comparison between the reconciliation crucial to ending the Troubles, they said both Leave and Remain voters must be brought into the Brexit process.
They said the new delay to Brexit until October 31 meant there was now time for a referendum - and called on Mrs May to lead it before she quits Downing Street.
Tony Blair and Bertie Ahern (pictured together in 2006 while PM and Taoiseach) issued a joint call for a new Brexit referendum today warning leaving the EU was the biggest threat to the Good Friday Agreement
Mr Blair and Mr Ahern said the question of how to manage the border went to the heart of the entire Brexit negotiation.
Mr Blair and Mr Ahern both entered office in 1997 and shared a decade alongside each as Prime Minister and Taoiseach.
Writing in the Guardian today, they said: 'Following the Good Friday agreement, there were two referendums.
'The referendum in Northern Ireland, on the agreement,