Warner Blu-Rays have always been region free, and FYI, you're better off buying the Batman Coll Ed at Play.com, It's only £16.
http://www.play.com/DVD/Blu-ray/4-/5...s/Product.html
And as for the Gamestation deal, I am well tempted to get it, just so I have a backup player. With most HD-DVD's near the £5 mark, It's well worth it. Lol.
This is the list of BR's region free.
Blu-Ray Region Code Info