Leaves look like Crucifer - and I presume flowers will also match when they open.
No interactions present.
definitely vulgaris from upper leaves
Thanks, Tim. Thought it had to be something close, but hadn't confidence to be sure!
Hampshire Dragonfly recorder
Hampshire & IOW Wildlfe Trust
Lat/Lng: 50.9664, -1.9198
OS grid ref: SU057185