A GROUP of protesters forced work to stop on a section of a 150-mile gas pipeline being laid near Swansea this week.
The group is part of a campaign against the use of fossil fuels and spent a night huddled inside the pipes.
The work is being carried out as part of the National Grid's Milford Haven project, which will see a major gas pipeline stretching from south Wales to various parts of England and will supply one fifth of Britain's gas.
The protesters claim the pipeline is causing significant damage and they want the project abandoned.
They are calling for ecologically sound sources of energy to be used instead of fossil fuels.
Protester Jim Dunkley from Safe Haven Network said: 'We will fight this every step of the way and we will fight this non-violently.'
The work is being carried out by a joint venture featuring Dutch firm Nacap Land & Marine.
A spokesman for National Grid said: 'Safety is paramount in all the aspects of National Grid's work and we are concerned about the welfare and safety of the protesters on our construction site near Swansea.'
National Grid was set to meet with representatives from Safe Haven Network today (Thursday) to try to resolve the dispute.