In Depth

London Hilton bombing: anatomy of the IRA's hotel attack in 1975

Deadly Hilton explosion was just one of the attacks that scarred London during the 1970s, 80s and 90s

On 5 September 1975, a bomb was detonated in the lobby of the Hilton hotel in Park Lane, London, killing two and injuring dozens more. The IRA attack on the hotel was one of many so-called "spectacular" attacks mounted in London and other cities on the British mainland between the early 1970s and mid 1990s.

What happened on the day of the bombing?

At 11.55am, the offices of the Daily Mail received a phone call warning that a bomb would detonate in the Hilton hotel within the next ten minutes. Scotland Yard were contacted immediately, and three police officers quickly despatched to investigate the threat.

On arrival at the Park Lane hotel, the officers began a hasty evacuation operation – but there was not enough time to empty the building before the bomb exploded in the lobby at 12.18pm.Two people were killed in the blast. One, Robert Anthony Lloyd, was a married casino manager, with two children, who worked nearby, while the other was 39-year-old Dutch tour operator Grace Lodhuis. Sixty-three more people were injured in the explosion, many seriously. A Metropolitan Police officer responding to the incident recalled seeing "persons with both lower limbs blown off" among the casualties at the scene.

The Provisional IRA claimed responsibility for the attack, which was carried out by a unit which came to be known as the Balcombe Street gang. The group was responsible for a wave of more than 20 terror attacks in London before its members were arrested in December 1975.

What was the reaction to the attack?

The bombing did not receive the wall-to-wall coverage that might have been expected. By the time of the Hilton bombing, the Troubles had already killed more than 1,000 people on both sides of the Irish Sea, and the British public had become used to living under the threat of terrorism. To put the Hilton attack in context, an ITN journalist interviewing the head of Scotland Yard's bomb squad just after the incident asked how the explosion compared to others in London over the past few days.

The bombing of two Birmingham pubs ten months previously, which killed 19 and wounded 180 more, as well as deadly attacks on pubs in Guildford and Woolwich, continued to dominate the headlines as the public demanded action to catch the killers. This pressure would ultimately lead to the wrongful conviction of the Guildford Four and the Birmingham Six, considered two of the great miscarriages of British justice.

The Balcombe Street gang was caught by police on 12 December 1975 after a six-day siege on the London street which gave them their name. At their trial at the Old Bailey, the unit's members were tried on seven murder charges, including the death of bomb disposal officer Roger Goad, killed attempting to defuse one of their devices. The group was also responsible for the assassination of Guinness World Record co-author Ross McWhirter, who had publicly offered a reward for information leading to the arrest of the gang.

When it came to the Hilton bombing, however, the men claimed that they did not intend to kill anyone and had tipped off the Daily Mail to clear the building. The jury accepted their arguments and the men were convicted of manslaughter but, given the seriousness of the other charges, all four men were given life sentences. In April 1999, they were released under the terms of the Good Friday Agreement.

What happened next?

The IRA continued to target Britain throughout the 1980s and 90s, including the notorious bombing of the Conservative Party conference in 1984, which killed five but missed its primary target, Margaret Thatcher. In all, it is estimated that the IRA was responsible for the deaths of 1,800 people during the Troubles. There has been no IRA attack on mainland Britain since 2001, says the BBC, although sporadic violence continues to flare up in Northern Ireland.

The IRA left an unusual legacy in the capital – the removal of many of London's rubbish bins, a favoured location for planting bombs. From 1991 until 2011, there were no bins on the London Underground, while litter bins only reappeared in London's Square Mile in 2013, 20 years after all 2,000 were removed.

London's stoic response to the July 7 bombings in 2005 was credited by some to the city's experience with the IRA. "We are all so used to it with the IRA surprise attacks – it's not something you dwell on, but you take it in your stride," one Londoner told the LA Times.

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