A WEATHER warning for fog has been extended in to Saturday. 

The Met Office has extended its yellow weather warning for fog through to 10am tomorrow. 

It has said that areas of fog have persisted and are expected to become more widespread and freezing in places again on Friday night and in to Saturday morning in Dorset.

People are being warned of difficult driving conditions with journeys likely to take longer than usual. 

A Met Office spokesman said: "Fog and freezing fog patches with visibility less than 100 metres in places are expected to become more widespread again during Friday night.

"The fog patches are expected to slowly clear from the north and west of the area during the second half of the night, although some fog is likely to persist across parts of southern and southeastern England into Saturday morning. The remaining fog should clear from all parts by late Saturday morning."