Ruth Davidson is poised to quit as leader of the Scottish Conservatives.
The former journalist, who took over the top job in the party almost eight years ago, will “make her position clear in due course”, a spokesman said.
But it is expected she will step down on Thursday – with her resignation coming in the aftermath of Prime Minister Boris Johnson announcing plans to temporarily suspend parliament.
Davidson, who campaigned for Remain in the 2016 European referendum, had clashed with Johnson over the issue of the UK’s future membership of the EU.
The Scottish Tory – who was touted as a future leader of the UK Conservatives until she explicitly ruled out taking on the post – went up against Johnson in a televised referendum debate at Wembley Stadium in 2016.
She has been a vocal critic of Johnson and, during the race to succeed Theresa May, Davidson backed first Sajid Javid and then Jeremy Hunt over the eventual winner.
A spokesman for the Scottish Conservatives said on Wednesday: “Ruth will make her position clear in due course. There will be no further comment tonight.”
However he stated: “This decision is not connected to today’s Brexit developments in any way.”
Davidson, who is engaged to partner Jen Wilson, became a mother for the first time in October 2018 when she gave birth to their son Finn after IVF treatment.
She stepped out of the political frontline to go on maternity leave, with her deputy Jackson Carlaw standing in as interim leader.
She made her comeback speech to the Scottish Conservative conference in Aberdeen in May this year.
Her leadership has transformed the fortunes of the Conservatives north of the border after she took on the job in November 2011 – just six months after she became an MSP.
Under her, the Scottish Conservatives won a record 31 seats at Holyrood in the 2016 election, with the Tories ousting Labour from second place.
She cemented this result with a strong performance in the 2017 general election, when the party returned 13 MPs from north of the border – a result that helped keep May in Downing Street.
After Johnson took over as PM, Davidson lobbied to keep David Mundell – who she had previously described as her “work husband” – in post as Scottish Secretary, only for him to be sacked from the job.
Scottish Labour leader Richard Leonard said the loss of Ms Davidson would be a “real blow to her party”.
The Labour MSP added: “This shows that even within his own ranks, Boris Johnson is already losing support and credibility.”
We need your help ...
The coronavirus pandemic is changing our world, fast. And we will do all we can to keep bringing you news and analysis throughout. But we are worried about maintaining enough income to pay our staff and minimal overheads.
Now, more than ever, we need a vibrant, independent media that holds the government to account and calls it out when it puts vested economic interests above human lives. We need a media that shows solidarity with the people most affected by the crisis – and one that can help to build a world based on collaboration and compassion.
We have been fighting against an establishment that is trying to shut us down. And like most independent media, we don’t have the deep pockets of investors to call on to bail us out.
Can you help by chipping in a few pounds each month?