A protest outside Sizewell nuclear power station in Suffolk has finished peacefully.

Several people masked as fish locked themselves together across the entrance of Sizewell A and B shortly before 7am today.

Representing the Stop Nuclear Power Network group, the campaigners were demanding to see “firm contingency plans” on how nuclear material would be removed from the site if the sea level rised or coastal erosion threatened the site.

They claimed that plant operators and the Nuclear Installations Inspectorate had not taken the possibility of flooding and coastal erosion at the Sizewell plants into proper consideration.

Speaking shortly before 11am, a spokesman for EDF Energy which owns the site said the protest was “all but over” and campaigners had moved away from the entrance road.

She said: “We respect the rights of individuals to peaceful protest.

“We are also sympathetic to the pressure these events can place on the local community with whom we have strong links.

“EDF Energy places its highest priority on the safety and security of the public, its staff, buildings and installations.

“We maintain regular contact with the Police and other appropriate agencies and regularly review and adjust our security procedures across our sites. For obvious reasons we can not discuss the detail of what security precautions we have in place.”

Lucy Sheehan, spokesman for Suffolk Constabulary, said: “Police were called to reports of a small protest at Sizewell B at 6.58am.

“Police are liaising with colleagues at Sizewell and will deal with any criminal offences.”

Sizewell has seen several blockades in the recent years since it was suggested as a possible site for new nuclear station.