The next paragraph is also interesting ....
Saturday 20 Jan - Saturday 3 Feb
Through this period, compared to normal, there is an increased chance of colder conditions along with the associated impacts from low temperatures, ice and snow. Whilst colder weather is more likely to dominate, there is also the possibility of frontal systems at least encroaching from the west or southwest, bringing the potential for more widespread snow to parts of the UK as they butt up against cold air in place. These would also increase the likelihood of wetter conditions, at least in the south, at least compared to the preceding week or two.
Originally Posted by: GezM