In reply to G30RGE: Bet you wish you hadn't asked nopw ;P
You have said that you want a boot and crampon for winter HILLWALKING. In that case use either the boots that you already have with some warm socks and gaiters, and the crampon I linked to above. Cost £69.99 and gets you out over the winter.
If you don't already have boots then I would be going for a lighter boot, maybe up to B1, but B0 would work well enough for winter hillwalking, that you would be happy wearing all year round.
If you upgrade to a B1 winter boot for next year the above crampons will still fit. My mate has a thinsulate lined B0 boot (Berghaus, £70 Go Outdoors) and they were spot-on for winter hillwalking in the lakes with the same crampons. Both of us can afford to enjoy a few beers in the pub when talking abou the snow that never came :p
That is unless you have loads of money of course, in which case go for it!
I've walked up to 4000m in 3 season hillwalking boots (several times) and spent last winter plodding around the lakes in my Meindl Burma Pros with Grivel Monte Rosa crampons (same as the ones I linked above at Go Outdoors). It's not ideal, but I didn't enjoy myself any less.
You may have loads of money. In which case you can afford to spend £300 on a boot and £130 on crampons to use for a few weeks of the year (who knows how long a winter we will get?).
Otherwise there are a lot of "nice to haves" but you can still have fun on a budget.
Don't forget you'll be wanting an ice axe as well
May I recommend the North Ridge axe, also made by Grivel :p
*anyone that thinks you need a greater choice of crampons than the grivel Monta Rosa (or cheaper Go Outdoors version) for hillwalking, or says that you need a B2/B3 boot has far too much money to burn in my opinion, and will probably be suggesting that you need a pair of Quarks. No point buying a straight walking axe if you might want to progress in the future
If you do want to take the route of ice climbing in the future you can get on a course or try it indoors, and hire the kit to see how things go.