I was looking to buy some multipack deals on regular Coca Cola but came across this deal on the website. It says limited availability in stores so best to check your local store and see if they stock it.
6x1.25 litres of Coke is equivalent to 22 cans of Coke for £1! Meaning this is effectively 4.5 pence per full can of Coke!!!
Deal link - http://www.bmstores.co.uk/products/diet-coke-regular-bottles-6-x-1-25l-290021