He has asked Robin Newton to reflect on his position over the Christmas period
The leader of the Ulster Unionist Party's written a letter to the Speaker of the Assembly asking him to stand down after Christams.
Earlier in the week, Mike Nesbitt claimed Robin Newtons position was close to untenable.
It's after he allowed the First Minister to make a speech about the green energy scandal - without the approval of Martin McGuiness.
Arlene Foster's actions resulted in a mass walk out in the chamber by fellow politicians.
The letter from the Strangford MLA has been made public.
Woman rescued from house in Saintfield following petrol bomb attack
More than 100 firefighters tackle Omagh industrial fire as casualty airlifted
MLAs hit out at ‘Executive chaos’ after U-turn on special school summer schemes
Delivery driver forced at gunpoint to take object to police station
Elderly woman dies after road collision in Armagh