Fog across UK brings Christmas travel chaos as flights are cancelled
Met Office issues severe weather warning as Heathrow tells passengers to check with airlines before setting off
Thick fog moving across the UK is threatening to cause travel mayhem, with airports warning of cancellations and flight delays.
The Met Office issued a severe weather warning lasting into Sunday afternoon, saying reduced visibility would continue to affect southern England and south Wales and creep into the Midlands.
Source: Guardian Transport