GALWAY — Defence lawyers representing six people charged with terrorism in Northern Ireland told a Belfast court on Monday that a British security forces “agent provocateur” played a role in the suspects’ arrests. The six, who appeared on video from a nearby police station due to concerns about spread of the novel coronavirus, are accused of membership of the “New” Irish Republican Army (IRA) and of planning terrorist attacks. “Did an MI5 agent organize and finance these meetings?” one of the lawyers asked, referring to a British spy agency.