Video: Who is the DUP leader, Arlene Foster?
"The people of Britain have had a bellyful of promises and politicking", he wrote in The Sun tabloid.
Former Tory Prime Minister John Major has spoken out against Theresa May's intent to prop up a government with the support of the Democratic Unionist Party (DUP). DUP leader Arlene Foster is due to see May on Tuesday for crunch talks, which could force the delay of the government's presentation of its legislative programme to parliament by Queen Elizabeth II, due on June 19.
"We have seen in Northern Ireland over very many years that events always don't unwind as you expect them to unwind", he said.
George Bridges, another Brexit minister, quit the department, the Times of London reported, leaving Brexit secretary David Davis with a new team just a week before negotiations with the European Union are due to start.
That means leaving the EU Single Market, controlling immigration from the EU and leaving the jurisdiction of the European Court of Justice. The DUP does support Brexit, but does not agree with every aspect of the government's approach to date.
"We have worked as a party with the DUP before and those are productive talks. I don't think we have anything to fear from parliament debating it", he told the BBC.
Lawmakers, who are by tradition not named at such meetings, told Reuters that there were no dissenting voices and that the party had no appetite for a leadership election.
Britain's Prime Minister Theresa May (L) and France's President Emmanuel Macron hold a joint press conference in the grounds of The Elysee Palace in Paris on June 13, 2017. But she added that talks had also addressed "doing what's right for Northern Ireland, in respect of economic matters".
Brexit campaigner Michael Gove, whom May surprisingly reappointed to the cabinet Sunday as environment secretary, was also present along with other notable figures from both sides of the Brexit debate, such as Europhile Ken Clarke and Euro-skeptic trade secretary Liam Fox. Its leader, Jeremy Corbyn, who defied expectations and boosted his party's standing, has said it would be an "economic disaster" to leave the European Union without agreement.
May appeared contrite, sought to apologize for her failed election gamble and gave an explanation of what went wrong, according to the report.
On Monday, she faces members of the Conservatives' 1922 Committee, which can trigger a vote of confidence in a party leader if it receives letters from 15 percent of the party's MPs.
"So maybe every cloud has a silver lining and maybe people here will begin to understand what they're dealing with, with the DUP".
Leaders planned to discuss efforts to minimize the potential damage to Northern Ireland during talks on Tuesday.
"Although a deal would make parliamentary votes easier I'm not convinced it is absolutely necessary", he said.
The prospect of such a deal has already raised alarm in Dublin, where Prime Minister Enda Kenny has warned of the impact on peace in the British province, while the DUP's ultra-conservative views have also prompted criticism.
Some fear the viability of Northern Ireland's fragile peace - which has held since 1998 after decades of inter-community violence known as The Troubles - could rest on the arrangement, with doubts around the United Kingdom government's neutrality.