Katy Clark has said she will not stand in the contest to become the leader of Scottish LabourScottish Labour MSP Katy Clark has ruled herself out of the running to replace Anas Sarwar as nominations in the leadership contest open. The new Scottish Labour leader will be announced on September 19. Before nominations opened, Mr Marra said: “I’m running in this contest to unite and renew the Scottish Labour Party. “To offer hope again and to spell out what Scottish Labour is for, not simply who and what we are against. He said: “Paul understands that Scottish Labour cannot be a party of the Holyrood bubble.