small purple flower on roadside

small purple flower on roadside

Observation - small purple flower on roadside - UK and Ireland. Description: A small flower growing at the side of an urban path; 4 purple-ish heart shaped petals, spikey leaves not directly attached to the flower but on separate shoots. That is a 5p in the second picture.

A small flower growing at the side of an urban path; 4 purple-ish heart shaped petals, spikey leaves not directly attached to the flower but on separate shoots.
That is a 5p in the second picture.