Rishi Sunak faces mounting problems as third Tory MP quits in 24 hours

Prime Minister Rishi Sunak’s Conservatives will have a third by-election to defend (Leon Neal/PA)

British prime minister Rishi Sunak faces a third by-election test after a close ally of Boris Johnson resigned from the UK House of Commons with “immediate effect”.

In a tumultuous 24 hours for the Conservative Party, Nigel Adams MP announced on Saturday that he was following the former prime minister and former culture secretary Nadine Dorries’ lead in quitting Westminster.