Peritrechus lundii is often associated with Stork's-bll, Erodium cicutarium.  The front part of the pronotum has pale lateral keels. Antennae are black apart from the paler basal part of the 2nd segment.  The wing membrane has a pale apical spot. There is a single spine on the front femora.

Oher Peritrechus, but the apical white spot is of P lundii is distinctive

Good quality field photos or photos of a specimen, clearly showing antennae, pronotum and wing membrane.  Note any associated plant species.

Dry grasslands, heaths and dunes, often with Stork's-bill 

Adult: all year round.

Overwinters as an adult, becoming active in April-June when mating takes place.

Local (ref: British Heteroptera checklist 2021, on British Bugs website)

Rarely recorded

https://www.britishbugs.org.uk/heteroptera/Lygaeidae/Peritrechus_lundi.html