Notaris scirpi
I found this quite tricky using both Hackston and Duff. I got to Erirhinidae fairly quickly using Hackston but then made a mistake in that key and reverted to Curculionidae. ObsIdentify had been 100% certain it was Dorytomus longimanus but the absence of femoral teeth seemed to rule out that whole genus. Having got nowhere but dead-ends keying it as Curculionidae I eventually turned to Google Lens for inspiration. One promising suggestion was Notaris scirpi and that got me back to keying Erirhinidae, and in turn to Notaris scirpi.
Notaris scirpi showing close-up of antennae, tarsal claws, front tibia tip, front margin of pronotum, interocular distance, pronotum from side and top amd prosternal foremargin, Wendling Beck Environment Project (Norfolk, UK), 11th August 2023