There are four changes in the forwards with Bradley Davies coming in at second row and a brand new front row with Gary Powell, Rhys Thomas and Gethin Jenkins all starting.
There are only terrace tickets available for the match and supporters are advised to turn up early and bring cash for a speedier service when purchasing their tickets.
Blues Team: Ben Blair, Tom James, Jamie Robinson, Marc Stcherbina, Chris Czekaj, Nick Robinson, Mike Phillips,
Xavier Rush (c), Rhys Shellard, Scott Morgan, Deiniol Jones, Bradley Davies, Gary Powell, T Rhys Thomas, Gethin Jenkins
Replacements John Yapp, Duane Goodfield, James Goode, Ben White, Ed Fairhurst, Mosese Luveitasau, Nick Macleod
Scarlets Team: Barry Davies, Dafydd James, Regan King, Matthew Watkins, Mark Jones, Ceiron Thomas, Dwayne Peel (c), Iestyn Thomas, Matthew Rees, Deacon Manu, Vernon Cooper, Scott MacLeod, Dafydd Jones, James Bater, Nathan Thomas
Replacements Craig Dunlea, Ken Owens, Adam Jones, Alix Popham, Clive Stuart-Smith, Gavin Evans, Darren Daniel