The Met office has warned that dense fog is likely to become more extensive in parts of London, southeast and eastern England through Monday morning.
Foggy conditions are likely to affect visibility and might cause traffic chaos. Visibility might drop to below 100 metres.
Traffic snarls can be expected in parts of London during Monday morning rush hour.
The Met office has advised people to take necessary precaution while on the road.
Similar weather conditions are likely to prevail in Yorkshire and Humberside, the East and West Midlands.