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Hi Tristan,

Chrysotoxum for sure. I'm fairly positive it's C. festivum though. Considering that the yellow stripes on the abdomen don't reach the side (almost), and the completely yellow tarses.

C. arcautum has a broader abdomen and the stripes don't match. But I'm saying this as an enthousiastic amature; I'm no expert!;)

Good luck!

Iolaire