The National:

SCOTTISH Tory leader Ruth Davidson was “f***ing furious” about The Vow, a new biography of the politician has claimed. 

The promise to deliver new powers to the Scottish Parliament if Scots backed a no vote in the 2014 referendum on independence was drawn up by Gordon Brown and backed David Cameron, Nick Clegg, and Ed Miliband.

READ MORE: Ruth Davidson was 'furious' over The Vow, new biography claims

The Vow, as it became known, was printed on the front page of the Daily Record on September 16, 2014, just two days before the independence vote.

The National:

In his book, Ruth Davidson and the Resurgence of the Scottish Tories, former Press and Journal reporter Andrew Liddle writes: “Ruth was – in the words of one senior party insider – ‘f***ing furious’ with Cameron over the Vow. While she had been consulted over the pledge, she was strongly opposed."

We've rounded up the best Twitter reactions to Davidson's fury. 

1. This SNP MP wonders whether Scotland's Unionist press will press her on these revelations (spoiler: they won't).

2. So the Vow was ancient history but the indyref is too recent to be revisited, despite them being just two days apart ... this tweeter finds an apparent contradiction.

3. The book will need to have plenty of blank pages to cover Davidson's silence on rape clause, disability and racists within the Tory party...

4. But it's fair to say most Twitter users weren't exactly surprised by these "revelations"...

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13. Several tweets mentioned Davidson's permanent f***ing furiousness about everything:

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Davidson is mostly f***ing furious at the SNP of course. At last week's First Minister's Questions Davidson used her first question to talk about independence, telling the First Minister she's sick of hearing about independence.

READ MORE: Nicola Sturgeon schools Ruth Davidson on how she's been getting on with the 'day job'

She also has said she was "angry" and "hurt" when she saw the Windrush scandal unfolding, despite the fact it was a result of her own party's "hostile environment" policy.

We await the day that she's so f***ing furious about something that she does something about it ...