Boulders weighing up to 2 tonnes being placed onto the seabed in the North Sea by Greenpeace
Boulders weighing up to 2 tonnes being dropped onto the seabed in the North Sea by Greenpeace Photograph: Andrew McConnell/PA
Boulders weighing up to 2 tonnes being dropped onto the seabed in the North Sea by Greenpeace Photograph: Andrew McConnell/PA
Greenpeace boulders may delay building of £12bn windfarms in North Sea

Activists dumped rocks off Norfolk coast on site of Burnham-backed project in protest against seabed trawling

The giant offshore windfarms backed by Andy Burnham this week may face unexpected stumbling blocks after Greenpeace activists unwittingly dumped about 15 tonnes of boulders on to the site as part of a campaign against seabed trawling in the North Sea.