Two investigative journalists have called for answers ahead of a tribunal hearing to examine allegations that they were subject to covert surveillance by UK authorities.Senior legal figures sitting on the Investigatory Powers Tribunal are hearing a case brought by Northern Ireland-based film-makers Barry McCaffrey and Trevor Birney.In 2018, Mr McCaffrey and Mr Birney rose to public prominence after they were controversially arrested as part of a police investigation into the alleged leaking of a

Two investigative journalists have called for answers ahead of a tribunal hearing to examine allegations that they were subject to covert surveillance by UK authorities.Senior legal figures sitting on the Investigatory Powers Tribunal are hearing a case brought by Northern Ireland-based film-makers Barry McCaffrey and Trevor Birney.In 2018, Mr McCaffrey and Mr Birney rose to public prominence after they were controversially arrested as part of a police investigation into the alleged leaking of a confidential document that appeared in a documentary the men made on a Troubles massacre.The Police Service of Northern Ireland (PSNI), citing a conflict of interest, asked Durham Police to lead the investigation into the inclusion of the Police Ombudsman for Northern Ireland document in the No Stone Unturned film on the 1994 UVF massacre in Loughinisland, Co Down.