Days of celebrations and the current weather setup have combined to reduce air quality across the UK, with London seeing a high air pollution alert issued.

Those in the capital have been asked to reduce driving where possible and to take advantage of public transport in an effort to curb the current situation.

The cause is multifold. After the fireworks of Bonfire Night and Diwali, much of the UK has seen only light winds under high pressure. Trapping particles in the air in the aftermath of the celebrations.

These conditions also contributed to the dense fog seen in recent mornings, while fog itself also worsens air quality by further trapping pollutants.

By Thursday, windier conditions are forecast across much of the UK. This will help to move the particles left in the air away, though also brings a wintry bite to the temperatures.

Ground frost will spread in many areas with overnight temperatures falling below the seasonal average for this time of the year.