A WEATHER warning has been issued for fog across Somerset as visibility is set to be restricted to 'less than 100m'.

The Met Office has issued the warning from 5pm this evening (Thursday) until Friday, December 28, at 11am.

Areas of dense fog are set to reform after a foggy morning across the county.

A spokesman for the Met Office said: "Areas of fog are expected form quickly Thursday evening with areas of existing fog expanding.

"Visibilities of less than 100 m is expected in places but as the fog forms it is likely to be patchy with varying visibilities in relatively short distances.

"During Thursday evening the fog in the southeast of England is expected to clear but is more likely to persist over parts of southwest England through into Friday morning."