Never used this site before, but seems like worth taking a risk at this price. Especially if you use the google checkout 'spend £30 get £10 off, so stock up on DVDRs etc. and take it to £30.
Use the Google checkout, 2 day delivery and you take it to £30.21, use the google checkout and take it to £20.21. I like.
MOD EDIT - the google checkout does not apply (just tested it) and the cheapest it shows up at is £26.68 using the super saver delivery. However, if you add smaller items to your basket to bring the cost ex-VAT over £30, the £10 google checkout discount might apply - make sure you see the green promotional text in your google checkout telling you of the £10 off.