Yes I can speak to some of the heating alternatives, and with experience of the cold in the far north of England.
Here in North Cornwall, we find air source and ground source heat pumps work really well for us, BUT...
- buildings must be very well insulated (including good double or preferably triple glazing) and draught proofed. We also have a heat recovery system in the ground floor of the building equipped with the air source heat pump.
- the boilers are pretty noisy, and the air source one in particular is very large and hence options for siting it were limited.
- it's still electric heating, so you need the electricity - and quantities of it - in the first place. A small wind turbine wouldn't give nearly enough, and in Co Durham I think it unlikely that solar would deliver enough in the short, often overcast winter days.
- it works well here in North Cornwall, where very few winter days - or even nights - fall below 0C. It works optimally with warm water, not hot, so I don't think it would be nearly enough for most of the winter in Co Durham or other northern reaches. Maybe useful for maintaining "frost free" in parts of the house not used much, or where they aren't used much during the day and you are happy to augment with a woodburner in the evening. (
But having lived in North Cumbria, I would go for a modern well-maintained Rayburn burning well dried hardwood, and / or look into the large water heat store type arrangement I mentioned above. (Which latter can burn largely unprocessed softwood produced in the vicinity - Keilder Forest etc.)