Tidal lagoons 'could be cheaper'

The development of three tidal lagoons by 2021 could deliver large-scale clean energy at a significantly lower cost than offshore wind, a study suggests.

The average cost of power from three lagoons in operation by early in the next decade would be around £100 per megawatt hour (MWh) over their lifetime, according to the research by energy economists at management consultancy Poyry.