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A Giant Dark Horsefly - Tabanus sudeticus, the largest fly in Europe
This was sat on a car in the rain, fortunately this one is a male, only the females bite and only when they need the extra protein to create eggs, the rest of the year like the male pictured the female feeds mainly on nectar.
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I forgot to say, you can tell it's a male by the fact there's no gap between the eyes and there's no large biting mandible
@photo Kjempeklegg, in Norway. Seems that its smaller relatives are worse bloodsuckers on humans. They rarely give up when they have found a victim - "klegg" also means "persistent (pest)" :-)