Shining Cranesbill (Geranium lucidum)
Photo: Lancelot Clark Storth (CWT) on 16th May 2021
I found this species just on entering Lancelot Clark Storth. At first I thought it was Herb Robert but it was only about 5mm across the full flowerhead making it about the 1/3rd size of Herb Robert.
The above top left photo shows the regular Herb Robert Geranium robertianum) and the top right its leaf profiles. And on the bottom for comparison we have Shining Cranesbill (Geranium lucidum). You get some idea of the size from the pen placed to its side.
Shining Cranesbill = Yellow anthers