Desperate pensioners say they are being forced to stay in bed to keep warm or choose between heating and using the oven. Jay, 85, told Age UK: “I am constantly cold at home unless I am in bed.

Shivering in the cold sparks biochemical reactions deep within ... On their third visit, volunteers lay in bed for 30 minutes as the lab temperature dropped down to a chilly 53F (11.6C).

Furthermore, when you are shivering or feeling cold in bed, your sleep will be fragmented as your body works harder to stay ...