Gavin Booth went the long way round in becoming a lawyer. Hailing from a working-class community in Warrenpoint, Co Down, with his father a plasterer and his mother a dinner lady, he originally set his sights on becoming a teacher, but dropped out of the course. “I never thought of myself ever as being a lawyer,” Booth told the jury on day three of his defamation trial against businessman Denis O’Brien. But law and criminology is what the 38-year-old ended up studying when he returned to education at the University of Ulster. While in college, he set up free Irish…