I see your point about being in the UK but I still want to try a solar oven, besides the power of reflecting the sunlight into the box could be more powerful than we think.
I have a old lectern which I could convert. It was going to the skip but I could try refurbishing it, perhaps it would only work in the summer, but I have a curious mind.
Anyway, back to business, I saw a solar oven and it had a temp gauge on it; between certain degrees it is apparently good for dehydrating. If it works I'll update.
Considering, or completed a DIY prepper project? Made something using traditional methods? Post it here!