At the co-op right now they have a deal on Cadburys Snow Bites £1.15 BOGOF, However via the co-op website there is also a 55p off voucher which makes it 60p BOGOF (30p a pack!)
Voucher can be found here, just click and printhttp://www.co-operative.coop/membership/membership2/pdfs/snowbites.pdf
Checked today and works. Also works at somerfield stores!
(The voucher states for members only, but i didnt need to use my membercard to get them at this price)