These ones are cheaper then 7 Day Shop Ultra AA M3 batteries (per each) http://www.hotukdeals.com/deals/duracell-ultra-m3-extra-high-power-/756678
I noticed that Home Bargains selling 12 batteries Duracell ULTRA M3 for £3.99.
Superb value pack of 12 batteries
AA alkaline battery with high-performance cathode technology
Duracell Ultra is the most powerful Duracell battery ever, giving more energy, efficiency and power
AA alkaline battery with high-performance cathode technology, high energy output, reliability, long shelf life, and good low-temperature performance
Especially suited to cameras, camcorders, MP3 players, PDAs, grooming products and toys