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Yes, now that there is a second photo, it is definitely a juvenile.
Thanks for that; out of interest, how does one immediately differentiate a juvenile from an adult?
It doesn't hold for all bugs, but for bugs which have full-length wings when adult: if you can see the body segments on the back of the abdomen, it is a juvenile.
Lat/Lng: 52.60569, 1.45686
OS grid ref: TG341064