Thick fog is affecting flights throughout the country but Stansted Airport is largely unaffected by the weather.

Around 45 flights – equivalent to 10% of departures – have been cancelled from Heathrow Airport as a yellow weather warning for fog covers much of England and east Wales.

London City Airport reported that a “considerable number” of flights have been cancelled, while Gatwick is also expected to have cancellations due to poor visibility caused by the fog.

Flights from other UK airports to the capital and some European cities were also disrupted by the fog.

A spokesman for Stansted Airport said it had not been affected but four flights bound for London City Airport were diverted to them because of the conditions.

“If passengers do want to double check then they can look at the airlines’ websites,” he said. “There may be some delays for flights coming in.”

Several flights have been affected at Norwich International Airport. Three departures have been cancelled so far this morning; the 6.40 to Aberdeen, the 7am to Edinburgh and the 9.45am to Amsterdam. Incoming flights from Amsterdam (9.10am) and Manchester (10.05am) have also been cancelled, while the 8.20am from Aberdeen was required to return.

The Met Office issued a yellow warning about fog for most parts of southern and central England.

They warned travel could be affected by poor visibility, with some minor disruption expected.

Their forecaster said: “Areas of fog are expected to form during Sunday night becoming widespread and dense in places by Monday morning. Travel may be impacted by poor visibility, with some minor disruption expected.

“A slack, moist airmass lying across much of England will allow fog to readily form again on Sunday night, reducing visibility to less than 100m at times. Fog will slowly lift and clear from many places through Monday.”

There are long delays on the A12 near Kelvedon due to a crash involving a lorry and three cars. The collision happened at 5.25am today – with the road partially blocked in the Colchester direction. Elsewhere motorists are also experiencing problems on the A14 – with two stretches of the road closed in Cambridgeshire following a serious accident between two lorries last night.