RUTH Davidson is to quit as the Tories' leader in Scotland today, senior sources revealed today.

Insiders said the Scottish Conservatives boss - who became a mum in October - will stand down due to pressures of motherhood and because she's "increasingly at odds" with Prime Minister Boris Johnson.

3 Ruth Davidson has quit as Scots Tories boss Credit: PA:Press Association

A senior Tory source said: "Ruth's been talking to senior party figures in the Conservatives for the last few weeks, both in Scotland and down south.

"She has been under huge pressure as a new mum. Nobody really fully understands how your life is going to change as a parent until it happens. Ruth is no different in this respect.

"She's tried to juggle motherhood with being the very high-profile leader of the opposition in Scotland, and it's taken its toll.

"All of this has been made more difficult with the current political climate, where she's found herself at increasing odds with the new leadership in London.

"The events unfolding at Westminster have not helped."

A Scottish Conservative source said tonight: “'Ruth will make her position clear in due course. There will be no further comment this evening."

Ms Davidson, 40, had been leader of the Scottish Conservatives since November 2011.

She was widely credited with turning around the party in Scotland, and was previously tipped as a future UK Tory leader - but ruled out the move last year, shortly before she gave birth to baby boy Finn in October, and Ms Davidson and partner Jen Wilson - Finn's other mum - have been juggling childcare duties.

Another Tory source said: "There are two reasons she has been considering going - family and Boris.

3 It comes as Boris Johnson plans to shut down Parliament

"Ruth and Jen are under huge strain. And Ruth is in a real hole with Boris - she can't defend him, it's toxic and goes against so much of what she's fought for."

A third source said Ms Davidson's refusal to back Mr Johnson - who she famously suggested was lying during the EU referendum campaign - had angered some senior Tories down south.

The insider said: "One figure at Westminster told me that it is about time 'Ruth wound her neck in'."

The bombshell revelation that Ms Davidson is quitting will send shockwaves across the party, after she was hailed as the saviour of the Tories north of the border.

At the 2016 Holyrood election, the Scottish Tories doubled their MSP seats to 31, replacing Labour as the main opposition tot he SNP,

And at the 2017 General Election, Tory MPs in Scotland rose from one to 13.

And their vote share was 28.6 per cent - the best performance since 1983.

3 A source said Ms Davidson's refusal to back Mr Johnson during the EU referendum had angered some senior Tories down south

Ms Davidson had a close working relationship with David Cameron, and was closely consulted by Theresa May.

However, she backed Mr Johnson's rival Jeremy Hunt in this year's Tory leadership race.

And after Mr Johnson won, she gave his appointment a lukewarm response, saying she would "judge his premiership by his actions in office".

She said: "I've been perfectly open and honest with him - he wasn't my choice for leader, I didn't vote for him. However, I will judge his premiership by his actions in office, as will everybody across the country.

"There is no job like Prime Minister. There's nothing that can prepare you for it. We'll see what he makes of it, and he's going to have to make a pretty good fist of it pretty early because of the challenges he's facing."

Relations were soured hours into Mr Johnson's premiership when the PM axed Scottish Secretary David Mundell, despite Ms Davidson arguing behind the scenes he should stay.

Ms Davidson returned from maternity leave in May at the Scottish Tory conference.

Ahead of her comeback, she described the "bone-crushing tiredness" of being a new mum.

In June 2016, the Scottish Tory clashed with Mr Johnson during a live BBC referendum debate from Wembley.

She accused Leave bosses of telling "untruths" on issues including Turkey and an EU army.

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During the televised showdown she said: "It's not the Boris show .... Boris can you name me one country in the world that has said it would give us a better deal if we come out of the EU?"

And at the end of the debate, referring to Mr Johnson and others, she said: "You're being asked to make a decision that's irreversible. We can't change it, we wake up on Friday and we don't like it, and we're being sold it on a lie because they lied about the cost of Europe.

"They lied about Turkey's entrance to Europe, they lied about the European army because we've got a veto for that - they put that in their leaflets and they've lied about this here tonight too and it's not good enough. You deserve the truth."