wall climber - possible speedwell?

wall climber - possible speedwell?

Observation - wall climber - possible speedwell? - UK and Ireland. Description: Trailing pale purple flower hanging over an old dry stone wall. I initially thought of wall speedwell but it doesn't seem to match other observations of that.

Trailing pale purple flower hanging over an old dry stone wall. I initially thought of wall speedwell but it doesn't seem to match other observations of that.