A UK trade union accused Iberdrola unit ScottishPower of “rank hypocrisy” for backing major green initiatives in Scotland while shipping giant offshore wind components from Spain and the Middle East “on oil-burning barges”.

The GMB Scotland union – which wants more offshore wind contracts awarded locally – claimed ScottishPower’s high-profile backing for efforts to make Glasgow the UK’s first net-zero city sit awkwardly with its procurement track record.