It's the day after one of the most shocking terror attacks in British history - a timebomb hidden in the Brighton hotel where the Prime Minister, Margaret Thatcher, and her cabinet are staying during the 1984 Conservative Party conference.

The casualties have all now been recovered. Four are dead, several of the injured are fighting for life.

Now all that remains is the rubble. Somewhere in here will lie the answer to who was responsible. Not the organisation – the Provisional IRA has already said it was them – but the individual human being, or beings, who left the bomb.

All the police have to do is find them.

Written and presented by Glenn Patterson

Series Producer: Owen McFadden

Executive Producer Rachel Hooper

A Walk on Air production in association with Keo Films