Ministers prepare to announce UK 's shale - gas reserves are much larger than previously estimated . UK 's only fracking project was suspended after two minor earthquakes in 2011 . There is extraction of gas and oil by pumping water at high pressure into the rock .
Ministers prepare to announce UK 's shale-gas reserves are much larger than previously estimated . Britain 's only fracking operation was suspended after two minor earthquakes in 2011 . Fracking is extraction of gas and oil by pumping water at high pressure into shale rock .