Future of UK generated power

[ppppenguin]

All frost-free freezers have the freezing elements outside the main compartment and blow the cold air into the food compartment. Every so often the fan is turned off and the freezing elements heated slightly to stop ice accumulating. I though that all fridge frezers with a single compressor (in other words almost all FFs though not my old Bosch which has 2 completely separate compressors) had some means of ducting cold air from the freezer into the fridge. Not sure how the relative temperatures are controlled.