Underwater damselfly

Yesterday, I was surprised to see a female damselfly in my pond under the water laying eggs on the stem of water plant.  Currently, I have three species of damsel regularly visiting the pond: large red, azure and blue-tailed.  Like most UK damsels, large red and azure lay their eggs while in tandem, as evidenced by the myriad of azure in tandem around the pond.  But checking my edition of Smallshire and Swash, I find the in blue-tailed the female lays eggs alone.  It does not say, however, that she may to this underwater. Hence, I presume this is a female blue-tailed damselfly, but it is hard to tell from the quality of the images.