The Met Offices slant on thing is quite bizarre. I wouldn't expect this near the start of the event would cause this much confusion for trained Meteorologists. I can understand that 2-3 days in advance there may be slight confusion, but it's supposedly starting tomorrow.. and somewhere along the line, either there has been mis-communication, or an error in one of the model outputs that has thrown it.
I'm not a trained Meteorologist, but to me, it's quite clear for the time period until Friday.
Tomorrow we will see a westerly orientated northwesterly entering the region, bringing forth relatively cold returning maritime Arctic air. At first the flow will be too saturated with warm dewpoint temperatures, so any light showers that start to feed into coastal regions will be of rain, for large amounts of the night time period. Unfortunately the showers at this time probably won't have the umph to continue inland, so they'll die away, leaving a clear, breezy night for many.
On Thursday it will probably start pretty featureless, in fact some people may question the validity of any snow forecast. From late morning to early lunchtime, we will see showers developing in the Irish sea as a result of warm seas and convection, these light at first will start filtering in over north Merseyside and South Lancashire, getting heavier as the time progesses. Towards the coast these will probably be of a hail/graupel mix, but as they move eastwards towards parts of Gtr Manchester and Northern Cheshire, they will increasingly turn to snow, leaving coverings, although perhaps westernmost areas seeing only short temporary accumulations of snow.
Towards the evening, as the wind direction back to more of northwesterly, we may see more general snow fall as a result of showers banding together from showers passing through the north channel (aka Cheshire Gap). This will bring more widespread snow, and possibly higher chance of accumulation on the coast.. perhaps a few cm.. however it will still be temporary covering on these parts.. but further inland, a more substantial, sustained covering of snow possible.