Teams:
Ospreys: Lee Byrne; Tommy Bowe, Andrew Bishop, James Hook, Shane Williams; Dan Biggar, Mike Phillips; Paul James, Richard Hibbard, Adam Jones, Ryan Jones, Alun Wyn Jones (capt), Jerry Collins, Marty Holah, Jonathan Thomas.
Replacements: Huw Bennett, Ryan Bevington, Craig Mitchell, Ian Gough, Justin Tipuric, Jamie Nutbrown, Gareth Owen, Nikki Walker.
London Irish: Topsy Ojo; Jonathan Joseph, Seilala Mapusua, Daniel Bowden, Sailosi Tagicakibau; Ryan Lamb, Paul Hodgson; Clarke Dermody (capt), James Buckland, Faan Rautenbach, Nick Kennedy, Bob Casey, Kieran Roche, Chris Hala'ufia, George Stowers.
Replacements: David Paice, Dan Murphy, Alex Corbisiero, Matt Garvey, Gary Johnson, Chris Malone, Elvis Seveali'i, Darren Allinson.
And yes you've read that right. Ryan Jones is starting at lock with Jon Thomas continuing at 8. Bit of an odd one, but it could work, as Jones is good in the lineout and offers tons of workrate. I'll certainly be interested to see how it goes, but not entirely sure moving another backrower to lock is what's needed!