Fog delays flights at London City and Aberdeen airports
Fog caused a number of flights to be delayed or cancelled at London City and Aberdeen airports on Tuesday morning.
London City was the worst hit, with dozens of flights to and from Europe and the UK affected.
The airport said on Twitter at 11:30 BST that visibility had improved, but that flights may still be delayed.
Heathrow said they had no delays caused by fog, while Gatwick said that the airport was "operating well".
In Aberdeen, a number of flights to and from Shetland were delayed by up to four hours.
Services from Aberdeen to Birmingham, Gatwick, and East Midlands were also affected.
At least 13 flights from London City were cancelled, including those to Frankfurt, Basel, Amsterdam, Glasgow, and Milan Linate.
Another 15 incoming flights were also cancelled, including arrivals from Zurich, Rotterdam, and Dublin.
A number of services were delayed, while others - including a flight from New York - were diverted.
Elsewhere in London, the Woolwich ferry service, which runs across the Thames, was suspended but reopened by 10.00 BST.
The Met Office issued a weather warning on Tuesday morning across south-east England, East Anglia, and the East Midlands, saying visibility was under 100 metres in places.
Brighter weather was forecast for the afternoon.
In the Netherlands, two people died in a 150-car pile-up caused by fog in the morning rush hour.
The accident happened between the southern cities of Goes and Middelburg, around 90 miles from Amsterdam.