Harlequins have made three changes to their forward pack for Big Game 17 against Bristol Bears at Twickenham’s Allianz Stadium.

Harry Williams returns at tighthead, while Jack Walker is set to make his 100th appearance at hooker.

Kieran Treadwell comes into the second row, and Chandler Cunningham-South starts at Number 8 with Zach Carr at blindside.

The backline remains unchanged, with Marcus Smith and Will Porter continuing at half-back.

Kick off is at 6pm tomorrow.