Hundreds of anti-fracking demonstrators have been protesting at the entrance of an exploratory drilling site in West Sussex in England.
Sussex Police said about 30 people had been arrested for obstructing the highway or assault. Amongst them, Green MP Caroline Lucas and her son. Lucas’s constituency, Brighton Pavilion, is about 20 miles away.
Energy firm Cuadrilla is drilling for oil near the village of Balcombe. Activists fear the next step will be fracking, the controversial energy-extraction technique.
Campaigners also forced their way into the company’s headquarters in Lichfield in Staffordshire and six activists glued themselves to the London Headquarters of Cuadrilla’s PR company.
About 20 protesters also demonstrated outside the constituency office of Horsham’s Conservative MP Francis Maude.
Prime Minister David Cameron has said he wants the UK to press ahead with the technique of exploiting shale rock to get gas and oil.
Campaigners fear fracking will pollute water supplies, cause minor earthquakes and damage rural areas.