For the second time on Thursday, the Met Office has issued a yellow weather warning for fog. 

The 19-hour yellow fog warning says there could be less than 100m visibility on roads.

The weather warning is in place from 4pm on Thursday afternoon and will remain overnight until 11am on Friday morning. 

The warning is expected to bring "difficult" travel conditions to the affected areas, with some areas set for less than 100 metres of visibility on the roads.

Weather enthusiast, Dorset Snow, has predicted that tomorrow will be the last day of prolonged fog. 

A Met Office spokesperson said: "Areas of fog are likely to reform and expand Thursday evening with large areas of poor visibility and some places seeing less than 100 m visibility at times."

The Met Office has warned drivers to be careful when driving in fog, according to the Highway Code headlights should be used when visibility is below 100 metres.

Before setting off on a foggy journey, drivers should make sure their lights - especially fog lights - are working properly.

The warning is in place for some areas in Dorset but does not cover Bournemouth, Christchurch and Poole.