A dark grey beetle only 2 or 3 mm long.

Adult pod mine

Adult - a photo is required and the specimen should be examined with a microscope and key feature photogrpahed. In the comments box, state the key or ID method used and describe the size and identifying characters.

Larval stage: photograph the mined pods; state host species in comments

Areas containing Broom.

Peak time for this species is May to July.

The larvae feed on the seeds of Broom.

Widespread in the southern half of Britain.

Occasional, though possibly under recorded in Leicestershire and Rutland.

http://www.leafmines.co.uk/html/Coleoptera/B.villosus.htm

https://bladmineerders.nl/parasites/animalia/arthropoda/insecta/coleoptera/polyphaga/cucujiformia/chrysomeloidea/chrysomelidae/bruchinae/bruchini/bruchina/bruchidius/bruchidius-villosus/