Ruddy or common darter?

Ruddy or common darter?

Observation - Ruddy or common darter? - UK and Ireland. Description: bit of a debate about this. Many people on survey thought this was ruddy darter, but im not sure if its a red common darter? Did a zoom in on the pic

bit of a debate about this. Many people on survey thought this was ruddy darter, but im not sure if its a red common darter? Did a zoom in on the pic