They've got it for £19.99 in Gamestation at the moment if that's any help.
Ah right thanks. They only appear to be selling it on their website in bundle packs, so I might have to ring them. £20 is still steep in my opinion so I might just ask how much a pre-owned copy of the game is. I've checked ebay and the prices there are worse than in the shops.
Again, in case anyone has missed it, I'm looking to buy FIFA if anyone else happens to know of any places, dodgy or not.