Yesterday it was really sunny and warm and I felt very lucky to catch a glimpse of this beautiful Beautiful demoiselle... That's actually the name. It also has a more impressive scientific name, Calopteryx virgo.
From what I read on this site this could be an immature male as the female has got a white spot on its wings. Perhaps you know about them and can clarify. One thing's sure as it's not the first time I've seen these creatures they seem to like living near that stream.
I used my mobile phone to take the photo as any noticeable 'click' of a camera would have scared the two (seemingly) identical specimens away. My mobile works better in cloudy days - thank goodness because that's the norm in these parts.