It was a mission.
Had a £20 gift card I got when I bought my 3DS from HMV, so I swung by the HMV at Wimbledon, they didn't have it. Ended up dodging police and protestors and got to HMV Trocodero, bugger was closed due to the idiots who broke away from the main protest. Walked to Oxford St - same thing, not open. Went to GAME on Oxford St - nothing on display, asked a (pretty clueless) woman about it and she had a quick look and said they didn't have it. So I got the tube home to Clapham, got off and popped into Blockbuster and they had it £24.99
Got lucky. Also trading my £20 gift card for £20 with the BF. So I got Okamiden for £5