The Met Workplace has issued a climate warning for fog, with tough driving circumstances and journey disruption anticipated.
Fog patches might develop into so dense, visibility might dip as little as 50 metres in some locations.
Many of the fog will clear round mid-morning on Saturday, however one or two cussed patches might persist till afterward.
The yellow climate warning impacts the South West, East Midlands, London, the South East and East of England, and can stay in place till about 10am on Saturday.
The Met Workplace has warned of slower journey occasions, with delays to bus and prepare companies potential, in addition to an opportunity of delays or cancellations to flights.
Motorists are suggested to be further cautious and permit extra time for travelling.
In recommendation about fog revealed on its web site, the nationwide climate service warns: “Issues to keep in mind when planning your journey are that fog might be very localised, so might not be obvious whenever you set off, and it may possibly have an effect on air journey and the roads in several methods.”
Elsewhere, a band of rain, heavy at first throughout Scotland and Northern Eire, will edge slowly in direction of the South East, getting lighter and patchier because it reaches northern England and Wales.
In different components of the nation, morning fog patches will clear to depart a tremendous, heat afternoon.
Tonight might see low cloud with some patchy mild rain, with the potential for extra patches of fog.