THE MET Office has issued a weather warning of fog for Dorset.

The yellow alert – which means ‘be aware’ – is valid from 5pm today until 11am on Friday.

A spokesperson 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.”

The fog is expected to clear into Friday morning.