Disclaimer: I'm only a weather enthusiast, not a professional meterologist. Take anything I say with a good pinch of salt, I do get things wrong sometimes!
In a normal year I wouldn't dream of starting a winter weather outlook thread at the beginning of September. This year there is a great deal of anxiety and interest about what the weather may hold for us.
Outlooks at this point can only ever be rough hand waving exercises, taking into consideration lots of factors and are likely to be inaccurate. I've been doing a lot of thinking and research over the last couple of weeks as to what might happen this winter. At this point the honest answer is: I haven't a scooby! (this might make this thread a bit pointless at this time!)
Looking at various long term models, solutions range from wet, mild and stormy, to cold and blocked or cold and snowy! I have an instinct that we are more likely to end up with a milder, dry scenario, with some colder incursions at times, but that is instinct and not based on anything quantifiable.
For someone who can talk through the various factors at depth, watch Gavin's winter outlook videos on Youtube.