Outbreaks of rain will spread southwards on Tuesday night into Wednesday morning, potentially falling as snow on hills for a time, before clearing to the south. As skies clear later, allowing temperatures to fall close to or below freezing, this will bring the risk of icy patches on untreated surfaces. Some temporary slushy snow deposits will be possible where snow persists for long enough, especially on grassy surfaces, but any significant accumulations will be largely restricted to communities and transport routes above about 300 m elevation. For further details see https://www.metoffice.gov.uk/weather/warnings-and-advice/uk-warnings