Most of us (or at least those born after the 1940s) probably take our freezers for granted. It seems a simple function, freezing things. But then, most things seem simple when viewed from a distance.

Fran scrutinises over 100 fridges, freezers and fridge freezers a year, to help you know what's hot, and what's – thankfully – not. In this article Why our freezer tests are different What are Which?