Make PC World give you stuff for cheaper than they want too

I've been out in town today, and spotted a few bargains about. However, rather than getting them from where I saw them, the best option is to get PC World to pricematch them, and get even bigger savings. I've put together links to the items in question at PC World, and put the price they are available elsewhere, and where from afterwards, and then the price you should get them for from PC World in brackets. Here they are:

Xbox 360
Play and Charge Kit Black/White - £9.99 at HMV (£9.49)
Battlefield: Bad Company - £13 at HMV (£12.70)

DS
100 Classic Book Collection - £15.06 at Tesco (£14.56)
Mario & Sonic at the Olympic games - £15.21 at Tesco ( £14.23)

PC
Pro Evolution Soccer 2008 - £2 at HMV (£1.20)
World In Conflict [Complete Edition] - £10 at HMV (£9.01)

There was also these in HMV, but PC World do not stock these:

Xbox 360
Mass Effect - £10
Blacksite - £8

PS3
Blacksite - £8

Wii
No More Heroes - £8

DS
Chocobo Tales - £8

PC
The Incredible Hulk - £2
Full Throttle - £4
Universe at War - £2
Billy Hatcher - £3