Unknown composite? Solidago?

Unknown composite? Solidago?

Observation - Unknown composite? Solidago? - UK and Ireland. Description: along roadside - very like Conyza sumatrensis in terms of form, height, structure but capitula more

along roadside - very like Conyza sumatrensis in terms of form, height, structure but capitula more akin to a Solidago (albeit with very short ligules)