A yellow weather warning for fog has been issued for parts of England.
The Met Office warned of possible delays to journeys during the morning rush hour on Friday and flights could be delayed or cancelled.
The warning covers parts of the East Midlands, Suffolk, South East and South West and runs until 10am.
The fog will slowly clear and Friday is set to bring mild temperatures for many, with highs of 13C (55F) in London, 15C (59F) in Leeds, 14C (57F) in Edinburgh and 16C (60F) in Aberystwyth.
Thursday was the warmest ever February day in Scotland, as Aboyne in Aberdeenshire hit a maximum temperature of 18.3C (64.94F) on Thursday afternoon.
It beats the previous high of 17.9C (64.22F) recorded in Aberdeen on February 22 1897.
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