The contest to replace British Prime Minister Boris Johnson gathered pace on Sunday as five more candidates declared their intention to run, with many pledging lower taxes and a clean start from Johnson’s scandal-ridden premiership.

Johnson on Thursday said he would resign as Prime Minister, after many of his lawmakers and cabinet colleagues rebelled over his handling of a series of scandals.

Junior trade minister Penny Mordaunt officially declared on Sunday that she was running, joining transport secretary Grant Shapps, finance minister Nadhim Zahawi and former ministers Jeremy Hunt and Sajid Javid, who announced their candidacies for the leadership in time for the Sunday newspapers, taking the total to nine.

“This is a critical inflection point for our country. I believe that a socialist or socialist-led coalition government at the next election would be a disaster for the UK,” Mordaunt said in a statement.

“We must win the next election.”

The Conservative Party’s 1922 Committee of legislators, which groups all backbench members of Parliament, will set out the exact rules and timetable for the contest in the coming days, and is looking to speed up the process of whittling down the contenders to a final two.

The Mail on Sunday said foreign secretary Liz Truss would launch her campaign on Monday.