The Met Office has issued this weather warning for ice and foggy conditions from 4 pm on Sunday 11 December.
The warning is in force until 11 am on Monday 12 December.
Freezing fog is expected to become more extensive overnight and could produce significantly reduced visibility to 50-100 metres at times, as well as patchy ice on untreated surfaces.
Additionally, snowfall that is now easing near and over the Cotswolds, as well as isolated showers elsewhere may lead to some ice developing on untreated surfaces.
Although becoming less widespread and thick by lunchtime, some places may be affected by fog for the remainder of the day, particularly in Northern Ireland and northern England.