Britain's former prime minister Keir Starmer, who stepped down as leader this summer after a tumultuous two years in power, announced on Sept. 1 that he would quit parliament to focus on "international affairs".

Keir Starmer is to step down as a Labour MP after resigning as Prime Minister earlier this summer to focus on international affairs and tackling violence against women and girls

Former PM says it is right time to go, which will trigger byelection that Greens’ Zack Polanski could target

Greens will target former prime minister’s seat in central London byelection

Former UK prime minister had previously suggested he would stay on in House of Commons