Image source, BBC Weather Watchers / GSDMARK

By Chris Fawkes

Lead Weather Presenter

Thick fog has formed on Friday morning across parts of the United Kingdom which could lead to hazardous driving conditions.

The Met Office has issued a yellow severe weather warning for fog from Lincolnshire, the East Midlands, the Home Counties into parts of Greater London.

Fog will be dense in places with visibility below 100 metres at times and it will be most extensive and disruptive during the morning rush hour.

It will slowly begin to thin, lift and clear later this morning but in some rural spots in eastern England it may not clear until this afternoon.

Image caption, Met Office severe weather warning for fog issued on Friday morning

The weekend forecast

Early morning mist and fog patches on Saturday may lift into low cloud, which could hang around all day.

Some areas will fare better with some spells of sunshine with many areas staying dry.

The exception to this theme will be north-west Scotland, where a…