I'll echo those sentiments. I live about 100M ASL in Carmarthenshire and even last Tuesday's dump of 5 inches was borderline - temps are now a degree or so higher than they were then and, for south Wales, I just can't see it happeneing on a widespread basis, if at all. Some favoured locations in south Wales may get some lying snow, but I think the 'best' that people can hope for is snow that simply won't stick/pitch/settle and, more likely than that, sleet or rain.
Now if the temp was a degree or two lower then I'd be far more optimistic, but looking at the charts (which of course are very variable!) I just can't see any major whiteout conditions here.
Perhaps if the precipitation is heavy then that will drop the temp enough, but that will just give the kind of snow that melts as soon as the precipitation ceases.
Give me 'proper' sub-zero temps instead of this borderline nonsense. Far easier to forecast AND 'better' snow.