Showers will continue to affect parts of central and western Scotland, at times this evening, tonight and into Thursday morning.
Clearer spells between these showers will lead to a risk of widespread ice, mainly on untreated roads. In addition some accumulations of snow are likely on some high level roads in the Highlands, mainly above 300m.
A widespread frost will also develop on Wednesday evening, overnight and lasting well into Thursday morning in N Ireland and parts of N England. Untreated roads will become icy especially where rain sleet and snow has fallen. On Thursday morning showers may spread in from the southwest into N Ireland, and fall onto frozen surfaces, increasing the ice risk.
Rain clearing Wales and SW England later in the night may well lead to icy stretches on Thursday morning even on roads previously treated.