Observed flying between and resting on tall grasses.
No interactions present.
Thank you for your alternative identification but I thought that female Common Blue damselflies were green.
Following on from RoyW's identification and my understanding that female common blues were in fact green I checked the British Dragonfly Society site and find that there is a blue form of the female.
Female Common Blue Damselflies come in green, blue and brown forms, with immature individuals often having a white base colour as well.
The precise pattern of the markings, particularly on the top + side of the thorax, and on the last few abdomenal segments are better features than the colour when identifying females.
Thanks for your help. I have now recorded it as a Common Blue Damselfly.
Lat/Lng: 52.7, -2.6
OS grid ref: SJ6312