British forecasters say freezing conditions and snowfalls that have grounded flights at London's Heathrow Airport will continue for most of the month.
Parts of the UK have experienced their second successive day of snow, closing some schools and delaying public transport.
600 flights have been delayed or cancelled at Heathrow, disrupting plans for as many as 18,000 travellers.
UK correspondent Malcolm Stewart says Heathrow Airport received seven centimetres of snow yesterday.
He says the airport's been operating at only half-speed despite the purchase of an addition 120 snow ploughs, at a cost of $60 million.
"Part of a huge investment plan, and this was after all the criticism last year when we did have a very cold winter. But they still had to cancel half the flights and people have been sleeping the night on the floors of various terminals at Heathrow," he told Newstalk ZB.
Malcolm Stewart says affected passengers are considerably disgruntled.