The Edinburgh winger will offer cover for James McLaren, who suffered a knock to his collar-bone in the 40-9 Calcutta Cup defeat by England at the weekend. Webster has been in great form for Edinburgh and was one of the few Scots to impress in the heavy defeat for the Scotland A team last Friday night.
Squad Mike Blair (Edinburgh), Andy Craig (Orrell), Kenny Logan (London), James McLaren (Bordeaux-Begles), Glenn Metcalfe (Glasgow), Chris Paterson (Edinburgh), Bryan Redpath (Sale Sharks, capt), Gordon Ross (Leeds Tykes), Gregor Townsend (The Borders), Kevin Utterson (The Borders), Simon Webster (Edinburgh), Ross Beattie (Bristol), Gordon Bulloch (Glasgow), Bruce Douglas (The Borders), Stuart Grimes (Newcastle), Nathan Hines (Edinburgh), Gavin Kerr (Leeds), Andrew Mower (Newcastle), Scott Murray (Edinburgh), Robert Russell (Saracens), Tom Smith (Northampton), Simon Taylor (Edinburgh), Jason White (Glasgow).