Mick Galwey moves up from the bench in place of O'Callaghan, Shane Stewart replaces Constable, whiloe Leinster coach Matt Williams will wait until late Thursday or possibly Friday before deciding who will partner Keith Gleeson and Victor Costello in the back-row.
Leinster Lions. Girvan Dempsey; Denis Hickie, Brian O'Driscoll, Shane Horgan, Gordon D'Arcy, Christian Warner, Brian O'Meara, Reg Corrigan (capt), Shane Byrne, Paul Wallace, Leo Cullen, Malcolm O'Kelly, Aidan McCullen/Des Dillon/Ben Gissing, Keith Gleeson, Victor Costello.Replacements: Emmet Byrne, Peter Smyth, Aidan Kearney, McCullen/Dillon/Gissing, Brian O'Riordan, David Quinlan, Adam Magro.
Bristol Shoguns. Shane Drahm; David Rees, Martin Shaw, Daryl Gibson, Phil Christophers; Felipe Contepomi, Agustin Pichot; Darren Crompton, Saul Nelson, Emiliano Bergamaschi; Garath Archer (capt), Alex Brown; Craig Short, Michael Lipman, Ben Sturnham.Replacements. Peter Richards, Matt Carrington, Andrew Higgins, Chris Rowland, Paul Johnstone, Andrew Sheridan/Scott Morgan, Rhys Oakley.
Munster Jeremy Staunton; John Kelly, Mike Mullins, Rob Henderson, Mossie Lawlor; Ronan O'Gara, Peter Stringer; Marcus Horan, Frank Sheahan, John Hayes; Mick Galwey, Mick O'Driscoll; Jim Williams (capt), Alan Quinlan, Anthony Foley.
Ulster. Bryn Cunningham; James Topping, Shane Stewart, Johnny Bell, Tyrone Howe; David Humphreys, Neil Doak; Justin Fitzpatrick, Matt Sexton, Rob Kempson; Gary Longwell, Jeremy Davidson (capt); Warren Brosnihan, Neil McMillan, Tony McWhirter.Replacements: Simon Best, Paul Shields, Mark Blair, Neil Best, Kieran Campbell, Adam Larkin, Scott Young.