The Met Workplace has issued a climate warning for fog, with tough driving situations and journey disruption anticipated.
Fog patches might change into so dense, visibility may 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 instances, with delays to bus and practice companies attainable, in addition to an opportunity of delays or cancellations to flights.
Motorists are suggested to be additional cautious and permit extra time for travelling.
In recommendation about fog printed on its web site, the nationwide climate service warns: “Issues to remember when planning your journey are that fog will be very localised, so will not be obvious while you set off, and it might have an effect on air journey and the roads in numerous 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 go away a advantageous, heat afternoon.
Tonight may see low cloud with some patchy gentle rain, with the potential for extra patches of fog.