TWO investigative journalists called for answers today ahead of a tribunal hearing over allegations that they were subject to covert surveillance by British authorities.

Senior legal figures sitting on the Investigatory Powers Tribunal are hearing a case at the Royal Courts of Justice in London brought by Northern Ireland-based filmmakers Barry McCaffrey and Trevor Birney.

In 2018, Mr McCaffrey and Mr Birney were controversially arrested as part of a police investigation into the alleged leaking of a confidential document that appeared in their documentary No Stone Unturned, about a Troubles massacre in Loughinisland, Co Down.