It isn't all doom and gloom; in south-west London, Merton Police have tried to lighten the mood by tweeting a picture of two snowmen, dressed in police garb and a row of police vans with faces drawn in the snow:
Forecasters have predicted it could be the coldest March in 50 years. In 1962, average temperatures for the month were 2.8C.
More top news
A police officer who spent six days crawling the London Marathon in a gorilla costume has finally completed the 26-mile route.
A man has been arrested on suspicion of murdering a 48-year-old man who was stabbed to death on a bus in central London.
Transport for London has made the badges and accompanying cards permanently available after a successful trial in autumn last year.