An Irish energy tycoon has revealed plans to build a new gas storage site in the Irish Sea that would boost the UK’s capacity by over 50 per cent. Tony O’Reilly Jr’s Dcarbonx, which is backed by gas infrastructure behemoth Snam, wants to redevelop a former gas site off the coast of Barrow-in-Furness as part of an £830m megaproject that it claims would address the “mounting national security risk”. O’Reilly, who is the son of the billionaire former Heinz boss of the same name, said the project would help…