Ulster playmaker Paddy Jackson returns at fly-half with team mate Andrew Boyle slotting in on the left wing and fellow Ulsterman, centre Luke Marshall, coming in at twelve. 

Ulster’s pair of Iain Henderson and Dominic Gallagher come in at lock and open-side flanker respectively.

Former Wales coach Ruddock said: “Following two very physical battles we have turned our attention to a Scotland team that is much improved from the Six Nations.

“They played very well against England and play a very expansive offloading game. We will have to be at our best to beat them and that is our goal.”

Leinster winger Andrew Conway has scored three tries in the last two matches and the Irish side will be looking to the Heineken Cup winner for inspiration as they look to move up the rankings with qualification for the semi-finals out of reach.