Synopsis:

In 1975 London endured 12 months of the most sustained bombing since the Blitz, from an underground cell of the Provisional IRA. Fifty explosions rocked the capital at a rate of one per week, leaving 35 people dead and scores more maimed for life. From assassinations such as TV personality Ross McWhirter, to bombings at Selfridge's and Harrods, they were also responsible for the pub bombings for which the Guildford Four were wrongly and notoriously convicted.

The Prevention of Terrorism Act was rushed through Parliament and properties were sand-bagged as if it was wartime. Throughout the campgain the gang lived quietly in safe houses in London , undetected by police and the intelligence services, until they lost their discipline and started driving through Mayfair firing their sub-machine guns. After a breakneck car chase and gun fight, the gang were cornered and the ensuing siege saw an elderly couple held hostage at gunpoint for five days while TV cameras zoomed in on the scene around the clock.

Based on unique accounts from the IRA bombers, this drama-documentary for Channel 4 combines archive footage with accounts from eye-witnesses and victims, as well as the chief police negotiator at the time of the chaos.