Orthotylus bilineatus
As Orthotylus species go, this one is relatively straightforward to identify. As well as the colours and pattern, the concave sides to the pronotum are significant.
The antennae are variously described as "mostly dark" (British Bugs website) or "mainly dusky" (Nau's draft key) but the antennae on mine were rather paler than this suggests (dusky on part of the first segment - dark at its base, fairly dusky on the fourth and slightly dusky towards each end of the second and third segments). It came to light in my garden.
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female Orthotylus bilineatus showing pronotum, corium hairs, antenna, rostrum, tip of abdomen from below and hind claw, North Elmham (Norfolk, UK), 13th August 2025
Another one turned up later the same month. Again the antennae aren't as dark/dusky as suggested by the references.
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Orthotylus bilineatus showing pronotum, North Elmham (Norfolk, UK), 26th August 2025