Alister Jack, the Scottish secretary, has spared Rishi Sunak a byelection by ruling out taking the peerage he is understood to have been offered by Boris Johnson.
The Dumfries and Galloway MP, a close ally of the former prime minister, became the latest Conservative to confirm he would stand down from his seat at the next election.
Sunak could still face byelections in the constituencies of the former ministers Nadine Dorries, Nigel Adams and Alok Sharma, who are also believed to have put…