Revelation relating to then Northern Ireland home affairs correspondent, Vincent Kearney, a ‘matter of grave concern’

MI5 has conceded it “unlawfully” obtained the communications data of a former BBC journalist, in what was claimed to be an unprecedented admission from the security services.

The BBC said it was a “matter of grave concern” that the agency had obtained communications data from the mobile phone of Vincent Kearney, a former BBC Northern Ireland home affairs correspondent.

The admission came in a letter to the BBC and to Kearney, in relation to a tribunal examining claims that several reporters in Northern Ireland were subjected to unlawful scrutiny by the police.

It related to work carried out by Kearney for a documentary into the independence of the Office of the Police Ombudsman for Northern Ireland (PONI). Kearney is now the northern editor at Irish broadcaster RTE.