I eat a lot of yogurt and am quite fussy about it. I have never managed to find here the type I like which is quite easy to find in France,especially in farmers markets but also in good supermarkets. It's somewhat watery but set, with a very thin creamy top layer and is a bit sour.
I have tried to make it, following Nigel Slater's recipe, but ended up with liquid milk with a few thicker patches, and not at all sour.
Tips for making and/or buying please. I live in south London.