In reply to Flinticus:
As CurlyStevo mentioned, those don’t look like heel bails for crampons on your existing boots, so yes not right for the new-matic binding. So regardless of which new ones you choose, do make sure you’re using full strap on crampons with your existing boots. Are your G10s strap on at the heel?
Some options for winter and alpine B2 include Scarpa Ribelle, Scarpa Manta, Scarpa Charmoz, La Sportiva Trango Tower (not to be confused with the Tower Extreme which is a B3), Karakoram HC. Other brands may include Garmont, Lowa, Boreal (Arwa), Aku - although not sure on availability in the UK at the moment.
I have the Aequilibriums but I have only taken them on a summer test walk so can’t speak to durability. They appear to take a crampon okay although I agree the fit is a little funny with the heel. I don’t think it’s a deal breaker though. Also it appears that it may be difficult to get them re-soled in the UK.
Another consideration for winter boots apart from durability and crampon fit (and how well they fit your feet of course) is warmth - heavier boots like the Manta or Karakoram will be warmer. Depends a bit what you’re doing and in what conditions but for any long days where you might be stopping or colder conditions or if belaying on lower grade routes then insulation could be a factor.