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Lib Dem leader Tim Farron has responded to the news of a "confidence and supply" deal between the Tories and the DUP.

He said: "Theresa May needs to make the terms of her confidence and supply deal with the DUP clear to the British people immediately.

"The actions of this government will have profound implications for the Brexit negotiations and the future of our country.

"At such a critical time, the prime minister must be clear with the people about the deal she has stitched up with the DUP behind closed doors."

BBC Newsnight

Former climate change minister Lord Barker said Brexit negotiations would only remain "on track" if Theresa May can command the confidence of her party in the commons.

But he said the Tories need to rethink what Brexit looks like, following the election result.

It's not a coalition and it's not yet even a "confidence and supply" arrangement because only the outline has been confirmed.

"Confidence and supply" is a much looser agreement than a formal coalition like the deal struck between Nick Clegg and David Cameron in 2010.

Essentially the DUP can now guarantee Theresa May will not be hit with motions of no confidence in Parliament - but it will come at a price.

The supply part means the DUP will get granted concessions, including parts of their manifesto being put through. But they will also be allowed to withdraw support from Tory proposals they do not agree with.

In 2015, Daily Politics reporter Ellie Price made a video looking at the prospect of a confidence and supply arrangement.

BBC Newsnight's Marc Williams tweets...

So, the principle outline of an agreement has been made with the finer details being put forward for discussion at a cabinet meeting on Monday. But what do we know about the Democratic Unionist Party?

Basically, they are pro-union (not Europe but UK), pro-Brexit and socially conservative.

Its 2017 manifesto, external set out its position on Brexit and other issues, including:

• Further increases to the personal tax allowance - similar to Conservative Party policy
• Continued rises in the national living wage - similar
• Renew Trident - similar
• Revisit terrorism laws - similar
• Abolish air passenger duty - different from the Conservatives
• Cut VAT for tourism businesses - different
• Call for "triple lock" on pensions - different

BBC Newsnight

Newsnight political editor Nick Watt said the DUP and Conservatives had been "looking at the full range of possibilities" when Tory chief whip Gavin Williamson visited Northern Ireland today.

The parties discussed anything from just an informal undertaking all the way through to a full coalition agreement.

He added: "I am told that what the DUP are looking at is securing benefits. So keep the pension triple lock and preserve universal benefits such as the winter fuel allowance for pensioners.

"What that would allow the DUP is to say: we are not just acting in the interests of Northern Ireland. We are true unionists. We are acting in the interest of the whole of the United Kingdom.”

A Downing Street spokesman said: "We can confirm that the Democratic Unionist Party have agreed to the principles of an outline agreement to support the Conservative government on a confidence and supply basis when Parliament returns next week.

"We welcome this commitment, which can provide the stability and certainty the whole country requires as we embark on Brexit and beyond.

"The details will be put forward for discussion and agreement at a cabinet meeting on Monday."

BBC correspondent Gary O'Donoghue said this is merely an outline agreement between the two parties adding there is an "awful lot to do to pin the deal down".

Northern Ireland's DUP have agreed the principles of an outline "confidence and supply" arrangement to support the Conservatives in government, Downing Street says.

BBC political correspondent Gary O'Donoghue said the appointment of former housing minister Gavin Barwell as Downing Street's new chief of staff was a "clever move".

He said Mr Barwell was well liked in the Parliamentary Conservative Party, had experience as a minister, and "incredibly importantly", had spent several spells in the whips' office.

BBC Newsnight

Former climate change minister under David Cameron, Lord Barker, says there is no appetite among Conservatives for an immediate leadership contest.

But speaking on a special Saturday edition of Newsnight, he said there "clearly" would not be another election with Theresa May as leader.

He said Mrs May was a "competent minister, potentially a tough negotiator, but a terrible campaigner".

Nadine Dorries, Conservative MP for Mid Bedfordshire and Heidi Allen, Tory MP for South Cambridgeshire, exchanged tweets over the proposed working arrangement currently being worked on between the Conservatives and the DUP:

The prime minister's full statement on the appointment of Gavin Barwell.

Gavin Barwell's appointment follows the resignation of Mrs May's closest aides Nick Timothy and Fiona Hill, who had served as joint chiefs of staff.

"I voted for Theresa May to become prime minister," he said. "I believe she is the best person to heal the divisions in our country that last year's referendum and the general election have laid bare, getting the best Brexit deal for the whole country and leading us towards a brighter future outside the EU.

"I'm thrilled to have the opportunity to serve as her chief of staff."

The appointment of Gavin Barwell as Downing Street's new chief of staff comes two days after he lost his Croydon Central seat in the election to Labour.

Earlier he had given his backing to Theresa May staying as prime minister, saying she had "all the qualities that we need and I think what the Conservative party needs to do is get behind her and support her in that job".

Announcing the appointment, Mrs May said Mr Barwell will bring "considerable experience" to his new post.

Former housing minister Gavin Barwell has been appointed the new Downing Street chief of staff.

Radio 4 PM

The PM programme spoke to a public relations chief - a former Sky News journalist - and the former deputy Speaker of the House of Commons about Nick Timothy and Fiona Cunningham, to ask them their impressions of the former joint chiefs of staff at Downing Street. Both were trenchant in their criticism.

Joey Jones, now head of public affairs at Weber-Shandwick, the public relations firm, said he had known both aides from his time as a journalist and had actually worked with Fiona Hill at Sky News. He said it was "no secret" that the two were "volatile and occasionally aggressive individuals".

Meanwhile the senior Conservative Nigel Evans - already on record for criticising the party's election manifesto Mr Timothy had helped draw up, saying it contained "everything except euthanasia for the over 70s" - said he was "really pleased" Mr Timothy had gone.

Mr Evans said:

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