The UK Health and Security Agency (UKHSA) has issued a warning about the cold.
People are being urged to wear several thin layers and have plenty of hot drinks if they’re feeling the chill.
Dr Agostinho Sousa, head of extreme events and health protection at UKHSA, said: “Cold weather can have a serious impact on health, particularly older people and those with pre-existing health conditions, as it increases the risks of heart attacks, strokes and chest infections.
“During this period, it is important to check in on family, friends and relatives who may be more vulnerable to the cold weather.
“If you have a pre-existing medical condition or are over the age of 65, it is important to try and heat your home to at least 18°C if you can.”