This was the 'shelf display' price - it didn't have any stickers to indicate that it was a sale item.
So although I think it's nationwide, I can't be certain.
I've also posted a deal for Grainger Games as it's £25 in the Stockport store - but this may be store specific as it's just opened. I know that WH Smith have it cheaper - if you can find a store still selling games - but these are the best instore prices I've found.
There are better online prices as well - such as £26.85 at ShopTo - but I thought it worth listing for anyone needing it quickly ...