A jumping spider with a body length of 3 to 4 mm.

Other species in this genus. 

Identification of this species  "Requires examination at high magnification in good lighting, typically examination of the genitalia." Bee, L., Oxford, G., & Smith, H. (2020). Britain's Spiders: A Field Guide. Second Edition. Princeton University Press.

Mostly found inside buildings.

Adults can be found indoors, even in deep winter.

Widespread in the southern half of Britain.

Status in Leicestershire and Rutland not known.

https://srs.britishspiders.org.uk/portal.php/p/Summary/s/Pseudeuophrys+lanigera