Seen on the Purbeck coast (above limestone cliffs) in spring.
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Many thanks for this Alan. Looked it up and this looks like a female. without the eponymous v-sign, but with a fat abdomen (broader than long).
This was on limestone just above the clifftops. Roberts suggests this is more often found on heathland, but also includes 'stony ground' which covers the area well.
It seems to be something of a Dorset and Surrey speciality, oddly without New Forest records (on NBN), which does suggest heathland. I'm going to send this in to local records with a question mark.
Jamie from Briantspuddle
Jamie, I'm not exactly sure who you're sending it to but hopefully it's a sufficiently distinctive species to be Id'd from a photo.
Lat/Lng: 50.5919, -1.9867
OS grid ref: SZ010769