LONDON: A series of collisions hit the M20 after “heavy snowfall” as the UK braces itself for what may turn out to be the coldest week of the winter so far.

Forecasters warned temperatures could hit “double negative” figures in parts of Scotland, while hovering around freezing across much of the UK.

Police in Kent urged drivers to be extra careful after being called out to collisions on the road near Maidstone in the wake of a snow shower.

Warning that snow and ice could result in difficult driving conditions across the wider road network, their road unit tweeted some advice for motorists.

“Be aware. Extra time. Allow space, watch for changing road conditions. If you get stuck stay with your car leave engine running. If you are able, low gear low revs keep moving,” they said.

The Met Office warned the chilly weather is here for the long run, with temperatures “below average” for much of the month.

Rain, sleet and snow are set to sweep the UK, potentially disrupting transport and leaving icy patches on roads, pavements and cycle paths, according to a warning in place between 8pm on Monday evening and 3pm on Tuesday.

Forecasters have advised people to leave extra time for journeys that may be affected.

Alex Burkill, meteorologist at the Met Office said: “It is a very cold start to the day with widespread harsh frost. It fell to nearly -6ºC in Katesbridge, Northern Ireland. Widely temperatures are a few degrees below freezing.”