I was in game Welwyn Garden City and noticed this deal, I believe this is an INSTORE deal only and it seems to be nationwide!!
they had DJ hero both the renegade edition and normal reduced to £39.98
this seems to only apply to the wii/ps3 versions not 360
I grabbed the last ps3 renegade as it was to amazing a deal to pass up ,but they had several wii ones left
I also noticed gamestation had reduced the price to £39.98 to but only for the wii normal version
UPDATE: It seems that the Renegade edition @ £39.98 is wii only
but both ps3/wii normal editions are £39.98 aswell
you may get lucky like me and get a ps3 renegade, but it is unlikely going by what others have found
it may be worth phoning your local game/gamestation to see what they have!