The 2019 intake – remember that Red Wall? – are particularly alarmed, which makes sense given their slim majorities after votes were “lent” to them during the last election. Many are said to be preparing to submit their letters to the chairman of the 1922 Committee of backbench MPs, Graham Brady, who sets the agenda on Conservative leadership contests.
Article source: https://www.huffingtonpost.co.uk/entry/how-does-a-tory-leadership-contest-work_uk_61e73818e4b0d8b66571aef8