Ulster will be looking to retain the focus and pace that saw the side record a bonus point victory over European champions Munster last Saturday at Thomond Park and only one point separates the Scots from Ulster in the Magners League table at present.
Williams has included all five of last Saturday's try scorers for selection for the Scottish clash, as well as Man of the Match Ian Humphreys. Scottish International Rob Dewey, returns to the Ulster squad in time to potentially face his old club after featuring for the A side earlier this week, while the squad is boosted by the return of lock Ryan Caldwell who has recovered from an ankle injury. Ulster and Ireland's Bryan Young is also included as is youngster Ian Whitten.
Carlo Del Fava, Cillian Willis, Simon Danielli and Bryn Cunningham have all been ruled out of selection for the away match, due to injury.
Matt Williams, who will name his starting XV on Thursday, commented: "What we did against Munster was a real achievement, but every match is a clean slate and we are going into this game with as much determination and focus as we did Saturday's and that means taking nothing for granted. There are no guarantees in this league and Edinburgh are a strong team with pace on the ball. They have shown their skills with a win over league leaders, the Ospreys. This is a critical game for both sides, and we all know it will be a tough contest to the final whistle."
ULSTER SQUAD FORWARDS
Justin Fitzpatrick; Nigel Brady; Tom Court; Brendon Botha; Bryan Young; Ed O'Donoghue; Matt McCullough; Kieron Dawson; Robbie Diack; Stephen Ferris; David Pollock; Rory Best; Ryan Caldwell; Filo Paulo
ULSTER SQUAD BACKS
Timoci Nagusa; Darren Cave; Andrew Trimble; Rob Dewey; Paul Marshall; Clinton Schifcofske; Ian Whitten; Isaac Boss; Paul Steinmetz; Ian Humphreys; Mark McCrea; Paddy Wallace
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