Brachyiulus pusillus

Apparently this species can be confused with immature Tachypodoiulus niger and Ommatoiulus sabulosus. I think the very short tail extension rules those out in this instance. I didn't dissect it but couldn't see any gonopods, so am assuming it is not an adult male. Therefore I did not eliminate the extremely unlikely Brachyiulus lusitanus.

Brachyiulus pusillus showing tail, North Elmham (Norfolk, UK), 21st April 2022

This time I did find its gonopods so was able to eliminate lusitanus.

Brachyiulus pusillus showing tail and gonopods, Wendling Beck Environment Project (Norfolk, UK), 17th-18th May 2023