That the heaviest snowfall in England since 2013 it has caused massive travel disruptions across the country as flights and trains are cancelled.

Gatwick and Stansted Airports suspended flights to clear the runway of snow, which had reached a height of 10 centimeters.

In a statement, Stansted Airport said that “passengers are advised to check their current flight status with their airline.” The airport runway reopened at 0300 local time (0300 GMT).

More than 40 flights at London’s largest airport, Heathrow, were also cancelled. Flight delays to Heathrow and Gatwick continued Monday morning.

The Met Office, England’s National Weather Service, issued an amber alert for northern and southwestern Scotland, Northern Ireland, northeastern England, the Midlands, and southwest and southeast, including London.

Southeast Railways warned passengers “not to travel” unless necessary. More disruption is expected across the country as a strike by the Rail, Maritime and National Transport Workers’ Union also takes place from this Tuesday to next Monday.

Meanwhile, National Highways also advises southeastern road users not to travel unless it is absolutely essential.

Drivers have to leave their cars in several places due to the high probability of slipping. Kent was especially hard hit, with major disruptions slowing traffic on the M2, M20, A21 and A249 motorways.

Cold weather and snow are expected to continue for a few more days across the UK as temperatures rise slightly from sub-zero levels.