Ruth Davidson has announced her resignation as leader of the Scottish Conservatives after eight years in the role.
In a letter to the the chair of the party, Robert Forman, Ms Davidson said her reasons for stepping down were family and the "conflict" she felt over Brexit.
"I fear that having tried to be a good leader over the years, I have proved a poor daughter, sister, partner and friend," she wrote.
"The party and my work has always come first, often at the expense of commitments to loved ones. The arrival of my son means I now make a different choice."
Ms Davidson gave birth to her son Finn in October last year, returning to work in April 2019.
The politician has been a vocal critic of Boris Johnson and his approach to Brexit, but says she will continue in her role as MSP for Edinburgh Central until 2021.
Under her leadership, the Tories - who were wiped out in Scotland in the 1997 general election - have become the main party of opposition to the SNP, largely due to a stong focus on keeping the country within the United Kingdom.
Lord Young of Cookham
Lord Young of Cookham also announced his resignation as the government's whip in the House of Lords, after Prime Minister Boris Johnson announced he was proroguing Parliament.
In his resignation letter, Lord Cookham conveyed his disappointment at Mr Johnson's decision.
"I was reassured by the Prime Minister’s statement during the leadership election that he was not attracted to the idea of using prorogation to facilitate a no-deal Brexit," he wrote.
"I am very unhappy at the timing and length of the prorogation and its motivation."
He continued to say that he thought the Prime Minister's commitment to leave the EU on October 31 "do or die" was a "rash" move.