Given the UK's typical solar exposure[0], and the quality of panels you can pickup at a supermarket, this has gotta be a net negative for a family right?
The UK's most southerly city, Truro, is still only at 50.26°N, but that's still further north than the border between the US and Canada.
Even down here at 57°N I'd need a solar farm the size of a football pitch to run a few lights in winter, and it would have to have the panels practically vertical because for the six hours or so the Sun is up the highest it ever gets is 9° above the horizon.
You're pretty okay for wind though, although if you're on the north-west coast it needs to be good for maybe 140-150mph sustained.