Sheet web spider (Linyphia sp.) at my parents'
More than half of the spiders in Europe belong to this family. Most are small (4 to 10 mm) darkly coloured things.
They build a complex web: a kind of hmmock with a funnel at the bottom they retreat in. Prey gets stuck in a forest of tripwires above the horizontal sheet, drop down and get caught by the spider, that tends to hang under the web.
There's another Linyphia sp. in our rosemary bush:
