Britain must be at the heart of a “shale gas revolution”, David Cameron has said, which could bring down energy prices and help “re-industrialise” the economy. Giving his public backing for plans to exploit the country’s onshore gas reserves – which is expected to be given the go-ahead by the Government very shortly – Mr Cameron said the new technology could transform our energy supplies. He said he wanted Britain to play a full part in the “revolution underway” and criticised environmentalists who were opposed to exploiting the technology. “We should take part in fracking because this might be a revolution and if we ignored it completely we could be giving our economy much higher energy prices than would otherwise be necessary.”