I don't know whether this is a groundhopper instar or adult? Or what kind of groundhopper?
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It's an adult and either Slender Groundhopper or Cepero's Groundhopper, as the pronotum is extended way beyond the hind legs. Probably the former.
My Flickr photos...
Lat/Lng: 52.0801, -2.1188
OS grid ref: SO919424
On the bankside hedges next to the river Avon