BBC: 'Substantial' shale gas in Wales, firms say

Companies keen on extracting shale gas have told MPs there are "substantial" opportunities in north and south Wales.

Last month, two south Wales councils backed exploratory gas drilling bids, prompting opponents' fears of potential future extraction, known as fracking.

The firms were making their case to the Welsh Affairs Select Committee's inquiry into energy generation.

Fracking opponents have held protests across the UK, including outside the Senedd in Cardiff Bay.

The technique, also called hydraulic fracturing, involves injecting water and chemicals into shale rock at high pressure.  MORE