Currently Felix AGAIG 24 pack is £9.28 each or 2 for £10 online at Pets at Home. However, use the 10% voucher for signing up to their newsletter (new email addresses can be used...) then the 10% discount actually applies to the prices before any discount, so two boxes are brought down to £8.15 - that's equivalent to £2.04 for 12 pouches!
Includes both favourites and ocean selection packs. Currently only available for collection in store, but I guess they'll restock online at some point to - offer ends 16th March. If they do this weekend then if you order over £30 after discounts it'll be free delivery.
Make sure you reserve online and take a print out of the reservation with you - when you get there they should just pull your reservation up with the correct price. When I collected my order initially it came up at the wrong price, when I pointed that out the guy figured out the new system (apparently recently changed) and got the lower price up.