Northern Ireland-related terrorism now represents a “substantial” threat to Great Britain, according to MI5 - the security service. It believes that a terrorist attack is a "strong possibility" in Britain and "highly likely" in Northern Ireland itself. This reflects the continuing threat from dissident republicans.

This week David Aaronovitch asks who are the New IRA?

Joining him in The Briefing Room:
Suzanne Breen - journalist at the Belfast Telegraph
Henry McDonald - Ireland correspondent at The Guardian
Peter Taylor - the writer and veteran BBC journalist

Producer: Joe Kent, Researcher: Alex Burton, Editor: Innes Bowen
(Image: Nationalist youths protest in their home town of Lurgan, Northern Ireland. Credit: Jeff J Mitchell/Getty) Show less