#2
This is the snail-killing fly or marsh fly,
Coremacera marginata (Sciomyzidae). You can find a picture in the gallery as well (
here).
#3
Someone suggested coremacera tristis, but I can't compare because I can't find any images of this. I gather coremacera marginata is more common, so more likely or does coremacera tristis look entirely different?
Andr