You can get the iPod Touch 4th Generation from Comet for £219 + Quidco which tracked for me at £6.72. This brings down the cost to £212.28
First, you'll need to register with Comet Perkshttp://www.comet.co.uk/static/sitepages/perks/comet_perks
Then go to the Comet site and 'Reserve & Collect' you iPod of choice
iPod 4th Generation 32GB: http://www.comet.co.uk/p/675768
When you then go to the store to collect your iPod, mention to the cashier about the 'Comet Perks' and tell them the email used to register.
When I got mine the other day, I also got a free travel speaker/charger (RRP £49.00):
PROLINE Tube iPod Travel Speaker: http://www.comet.co.uk/p/428353
However, this offer seems to have finished. :(
I should have submitted the other day, but totally forgot. Sorry.
Ideally, you need to register with Comet Perks at least 24 hours before collecting the iPod as it takes this long to 'Get On The System' apparently.