Andrew Henderson and Ben Daly after injury - Henderson has been out of rugby with a head knock. Daly’s last game was as a replacement against Edinburgh at Hughenden on Boxing Day, an appearance that lasted only a few minutes until he was forced off with a knee-ligament injury. Rory Kerr also gets a rare start at full-back.
Eight club players, all forwards, have been called on for tomorrow’s match. Gordon Macfadyen of Glasgow Hawks, Justin Reid of Glasgow Hutchesons' Aloysians and Damien Kelly and Paul Burke of Ayr start the game while Stephen MacKinnon of GHA, Colin Eadie of Stirling County and Gavin Mories and Stuart Male of Hawks are among the replacements.
Team: Glasgow’s back-up XV: Kerr, Bartlett, A Bulloch, Henderson, R Reid, Irving, Sinclair, Macfadyen, Daly, A Kelly, J Reid, Ross, D Kelly, Burke, Simpson. Reserves: MacKinnon, Blades, Mories, Wilson, Male, Eadie, Black, Hayes, McInroy, Howarth
Scotland Under-21: Warnock (Boroughmuir and SIS), Turnbull (Watsonians), Morrison (Glasgow Hawks), Philip (Edinburgh Rugby and SIS), Shaw (Glasgow Hawks), Godman (Newcastle Falcons and SIS), Cusiter (Boroughmuir and SIS), Dickinson (Dundee HSFP and SIS), Thomson (West Of Scotland and SIS), Malakoty (Glasgow Hawks), Strokosch (Boroughmuir and SIS), Rennie (Newcastle Falcons), Swindall (Glasgow Hawks), Hogg (Edinburgh Rugby and SIS) captain, Callam (Hawick and SIS). Replacements: Henry (Leicester Tigers), Cross (Heriot's FP) Brown (Melrose and SIS), Miller (Gala), McMillan (Stirling County and SIS), Rimmer (Pontypridd), Berthinussen (Gala)