Thousands of passengers at Gatwick Airport are facing delays for a fourth day in a row after severe fog led to widespread disruption over the Christmas period. More than 20 flights set to leave the airport today have been cancelled in advance while passengers have been told to expect delays.

Gatwick Airport has said operations are “returning to normal” after four days of fog-related flight restrictions. More than 20 flights planned for the West Sussex airport on Monday were cancelled in advance.

More than 1,000 flights were delayed at London Heathrow and Gatwick on Friday as fog created travel chaos for UK airports.