For over a year Brian Larkin relentlessly flew back and forth to London, desperately trying to drum up support. Week after week, the north Dubliner faced rejection as the then 34-year old tried to get his fledgling oil exploration company United Oil & Gas up and running. Named after Larkin’s favourite football team, Manchester United, it didn’t have a single asset. It only had a business plan knocked up on his laptop during a spell of bad weather around Christmas 2014. Larkin had quit his job in Tullow Oil, then a multi-billion euro valued oil giant, to pursue his dream.…