No longer advertised on site, but still works.
Here are the two cheapest items you can add to your cart to use the code.
2 of zavvi.com/toy…tml 65p each 2 for £1.30 OR
2 of zavvi.com/spo…tml for 99p each 2 for £1.98
Or you can get 1 of each for £1.64.