Laccophilus minutus

At 4.6mm long, lacking a visible scutellum and clearly having 5 tarsal segments on its fore and mid tarsi, this keyed quite easily to Laccophilus. The size and absence of a stridulatory file on the hind coxae identified it as minutus. Most photos of this species I found online seemed to show paler and more strongly-patterned elytra but these are variable.

Laccophilus minutus showing process of close-up of elytral patterning and hind coxae, North Elmham (Norfolk, UK), 23rd August 2022