Pilchard curry on the patio this bank holiday
(It does not help that every so often you get publicity about it all being a fad)
I am sure it is hard to get the vit D even in the summer here. I live in a dry part of the country and it is lovely in the summer when you can sit out, go out for walks, and wear your sun hat. But in between, there are a lot of dull, cloudy (windy) days. Some years, like last year, the tomatoes are late to ripen. It is hard to predict. You end up nipping in and out for the washing etc, but spending far too long indoors. When you go shopping, it is in the car, and out into the shop at the other end.