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I found one of these this week too, it was on a birch tree. Although it looked a bit more flattened than this one, so maybe it was one of the other species.
Biodiversity mentor - North West
If you find a Salticus on a tree trunk there is a good chance it's one of the two less common species (cingulatus, zebraneus) rather than scenicus.
Thankyou Chris and RachR, great . regards Keith.
Lat/Lng: 52.9704, -3.168
OS grid ref: SJ216420