The first Wiltshire Banded Demoiselle of the year [unless you know different!]. I discovered this and a few more while carrying out an odonata survey of the Waterhay area of the Cotswold Water Park. Including the young Thames.
Also seen were hundreds of thousands of Common Blue Damsels; Blue-tailed, Large Red, Azure and Red-eyed Damselflies. Plus several 4-spot Chasers.