The Met Office has issued a double fog warning as Storm Conall continues to inflict chaos across Britain.
Two fog warnings are in place for large parts of the country from the south of London to Northern Ireland.
In Northern Ireland, the Met Office said that Antrim, Armagh, Down, Fermanagh, Londonderry and Tyrone would receive the worst conditions.
Meanwhile, in England, the East and West Midlands, London and the south east, north west, south west of England as well as Wales are set to be affected as well.
Two fog warnings have been issued across Britain
Met Office
The yellow warning in Northern Ireland indicates that the forecast has a high likelihood, but low impact, while the one for England and Wales suggests there is medium likelihood and low impact.
Consequently, the Met Office has warned that train and bus services will suffer delays as well as flights, including that there is some risk that journeys will be cancelled altogether.
Its official forecast said that last night's fog will become "fairly widespread" which will lead to visibility dropping below 100m in some areas.
It added: "This will make for difficult driving conditions and may also lead to disruption of public transport.
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"With temperatures close to, and in places below freezing, icy patches in freezing fog will be an additional hazard.
"Fog will thin and clear from most places later in the morning."
Although travel is recommended to be avoided altogether, drivers are advised to drive very slowly with dipped headlights, since a vehicle's full-beam lights reflect off the fog, which then creates a "white wall" effect.
Once visibility improves, fog lights must be switched off. Additionally, it is important to keep an eye out for freezing fog since it can quickly form a layer of ice as it is made up of water droplets which then freeze on surfaces - including pavements, roads and cars.
Storm Conall - the third named storm of the season - has brought flooding and severe travel disruption across the country, which has even shut some train lines yesterday (Stock)
PA
Additionally, it is important to keep an eye out for freezing fog. As it is composed of water droplets, it can quickly form a layer of ice on surfaces, including pavements and roads.
Storm Conall - the third named storm of the season - has brought flooding and severe travel disruption across the country, which has even shut some train lines yesterday.
Lines that have experienced significant disruption included Thameslink, Gatwick Express, Great Northern, South Western and Southern.
Further afield, the Netherlands has issued a forecast warning the nation of "strong winds" ahead of the weekend as a result of the storm.
