Writings been on the wall for a few days on this, ECM puts that writing in paint.
Low Pressure will simply pass over the UK as it always does in these situations, it will only be cold enough to snow in a line from Cumbria northwards in my opinion.
Every year this happens, as soon as you see cold modelling being pushed back on the charts its obvious which way it will go.
One only needs to see the Ensembles anywhere south of the Midlands to see this cold snap around 27-29 will be confined to Midlands North and a quick (but temporary) return to Westerlies follows.
Im not holding much hope for seeing a cold and snowy winter in the UK at all this Winter, those times have gone just isnt going to happen...ever.