An uncertain identification of this 3mm or so spider. I think that this is a spider of the genus Eno, and if so, then either Ero cambridgei or E. furcata, which would be difficult to tell apart.

It was found at the same time as the other possible Ero species, and in the same location, which was in a (dry) plastic dustbin in my garden. Both of these are said to be widespread and common.