Blue-tailed Damselfly

It's recently got a little harder to find new species I can easily identify. A bit of a worry as there's still another 80 or so days to go.
This was around our pond in July and August: the Blue-tailed damselfly Ischnura elegans. It is an early coloniser of new ponds (which ours is). It is smaller than the similar, but much rarer, Scarce Blue-tailed damselfly. (Clue in the name.)