From MSE :)
"On Weds 12 Oct buy a £5.50 Cineworld voucher from daily deals website MoneySupermarketLocalDeals (the offer's not live yet). The voucher'll be emailed to you and is valid online only till 18 Jan 2011. The last day you can buy the voucher is 11.59pm Tues 18 Oct."http://www.moneysavingexpert.com/deals/cheap-cinema-tickets#cineworld
2D films only.
Level of discount dependent on location. Up to 41% off ticket.