Check Postcode and Sign-Up to this fantastic service here: http://www.milkandmore.co.uk
If Milk and More (part of Dairy Crest I believe) are able to deliver to your area, then this is a fantastic deal, effectively working out at 8p a bag.
You'll have to sign up online to have them delivered, but considering that it's free delivery, this seems an absolute bargain delivered right to your doorstep in the mornings.
What's great is that you can order upto 9pm the night before the delivery and they'll arrive on your doorstep the next day
If you set up a regular delivery service, you can use code: SAVE5 to get £5 off when you pay by Direct Debit