Very lucky here in Stoke, we have escaped virtually all of the snow.
The worst thing has been the wind, and the effect on boilers - ours, one of my daughters' and my mother-in-law's boilers all conked out on Friday!
We all share a plumber, who is wonderful, so of course, working until ten at night! He got us all working again though.
Our problem was the wind which blows into the outlet pipe and freezes the drain pipe, which conks the boiler. There is nothing you can do to prevent it, you have to leave the vent exposed, and lagging it has no effect on the boiler itself.
Happily, the fix is to disconnect the draining pipe and empty it, pour some hot salt water down it, and reconnect, and re-fire the boiler. I have done that again today, and it worked - yipeee!
I really sympathise with any AB'ers snowed in, we have been seriously lucky, and I am grateful for the fates that spared us.