The second image was obtained about 30 min. after the first.
(Pond skaters perhaps Gerris lacustris)
No interactions present.
This might be a newly emergent dragonfly that ran into difficulties.
The skaters tended to concentrate around the head and thorax.
Whether this multiple attack was by pond skaters operating independently, or cooperatively, is worth some thought.
Lat/Lng: 51.4337, -2.7624
OS grid ref: ST470707