Too anyone already convinced about the snow prospects for Tues/Wed, I wouldn't go about writing anything off at the moment. Predicting 2 or 3 days out with regards to snow is not very accurate at the best of times, but this particular developing system is proving harder to get a grip of than usual. There is still quite a bit of uncertainty. It is going to be cold, we know that. But when and where the precipitation falls, and what it falls as, we don't know very well yet. Lots of things can and likely will change between now and then.
I would pretty much ignore the BBC forecast for Tues and especially Wed right now when it comes to snowfall.
Each run seems to have been an upgrade for the past day or two. So i'm keeping positive, next week (well, technically this week, as we're on Sunday..) certainly looks to be interesting if nothing else. It'd be shortsighted to write it off at this stage.
I know as well as any that we are used to seeing the hype build up only for it to fall flat on it's face just as we get close, but I reserve judgement until we have high confidence in the forecast