I lost 2 weeks in January this year when I couldn't get the van off the drive, but with no snow to speak of here in Pembs (just 2" or so) I was determined not to let the cold weather get to me. We've had -4 or more most nights but i've been out every day. Here's what I did with my (Pure Freedom) system:
1. Make up new tap to booster pump and booster pump to van transfer hoses. Drain them and bring them in at night when van is full. Bring in booster pump too.
2. Remove the Hozelock connector on the van port and drain water from bit of hose that exits van floor, under van to said connector. If you don't it will freeze even though van is toasty.
3. Eleccy greenhouse heater in van set at 5c to ensure all parts of van remain frost free. All pipes, filters and RO insulated as best I can with that gray foam tubing and silver-faced bubble wrap (did this in September).
4. Keep flow from pole going when cleaning where usually i'd turn it off, so water has less chance to freeze in the hose jets.
5. Drain outside tap down.
6. Bring reel inside as this is the item that tends to stay frozen even inside the van given it is lying in snow or on frozen ground.
7. Put down salt on all wet patches. (I use silage salt from local farmer's co-op - was £3.50 / 25kg till they hiked price by 25%. Profiteering ar*ses, and my wife works there!!!).
8. I use Showa 460 gloves with a merino wool liner inside. Bulky but doable. Mid you Skytec Argon gloves
http://www.skytecgloves.com/skytec-gloves.php?glove=68 work well. After a while your hands do get wet, but for me they act like a wetsuit and are relatively warm. I have a dozen pairs so can swap them around.
I have found that water is freezing on glass on north facing walls. Water is also freezing on contact with the ground, but in general central heating in homes keeps panes OK. Unheated connies are a different matter. I have been starting at 09:30 and finishing at 15:30. With no lunch I can do 14 or so. I am not behind and have 5 to do today, hence late start

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Now, if anyone can help me recoup the hundreds of £ I lost in November due to the constant heavy rain we had here in West Wales I’d be grateful…