The azure damselfly (Coenagrion puella) is perhaps less common than the common blue but there are still a lot of them around. The male has a narrower shoulder stripe than the common blue and an extra short black line on the thorax - the coenagrion spur.
These I think are immature males.
Females are mostly green and are harder to find.
And this is an immature female, I think.
Here are mating pairs.
Here they are ovipositing en masse.
Here is an ovipositing pair of azure damselflies on the left and a pair of common blues on the right.