This might be old news but it really is a good deal so bears repeating.
Asda are offering a deal at their fresh instore pizza counter for £5. For your fiver you get:
2 x medium pizzas (£3 each)
1 x bottle 1.5 litre fizzy drink (Coke, Diet Coke, Fanta, worth about £1.79)
1 x Sky Store rental or Vue cinema ticket. (Sky Store rental is worth £5.49)
So in essence, if you were planning to rent from Sky Store anyway, get to Asda and you'll save 49p and get 2 pizzas and a bottle of fizzy drink.