Huge cannabis factory found inside Bangor, North Wales railway tunnels containing cannabis worth 225,000

Growing underground: Huge cannabis factory found inside North Wales railway tunnels containing drugs worth 225,000 Elaborate steel gates, doors and a trapdoor concealed sophisticated drug operation hidden behind legitimate mushroom farm Gerald Davies, Kenneth Vincent, Phillip Bigley and Christopher McIntyre jailed for their work at the operation | UPDATED: 18:59 GMT, 3 December 2012 A mushroom farm based in disused railway tunnels was in fact a front for a sophisticated cannabis operation with a potential annual turnover of more than 2m. Police raided the underground business after a tip-off and found a warren of industrial-sized growing rooms hidden behind fortress-like steel gates. Today four men were jailed for their part in the operation at the disused Faenol Tunnels on the Menai Business Park at Bangor, north Wales.