The Hyde Park and Regent’s Park bombings occur on July 20, 1982, in London. Members of the Provisional Irish Republican Army (IRA) detonate two bombs during British military ceremonies in Hyde Park and Regent’s Park, both in Central London.

At 10:40 AM, a nail bomb explodes in the boot of a blue Morris Marina parked on South Carriage Drive in Hyde Park. The bomb comprises 25 lbs. of gelignite and 30 lbs. of nails. It explodes as soldiers of the Household Cavalry, Queen Elizabeth II‘s official bodyguard regiment, are passing. They are taking part in their daily Changing of the Guard procession from their barracks in Knightsbridge to Horse Guards Parade. Three soldiers of the Blues & Royals are killed outright, and another, their standard-bearer, dies from his wounds three days later. The other soldiers in the procession are badly wounded, and a number of civilians were injured. Seven of the regiment’s horses are also killed or had to be euthanised because of their injuries. Explosives experts believe that the Hyde Park bomb is triggered by remote by an IRA member inside the park.

The second attack happens at about 12:55 PM, when a bomb explodes underneath a bandstand in Regent’s Park. Thirty Military bandsmen of the Royal Green Jackets are on the stand performing music from Oliver! to a crowd of 120 people. It is the first in a series of advertised lunchtime concerts there. Six of the bandsmen are killed outright and the rest are wounded. A seventh dies of his wounds on August 1. At least eight civilians are also injured. The bomb had been hidden under the stand some time before and triggered by a timer. Unlike the Hyde Park bomb, it contains no nails and seems to be designed to cause minimal harm to bystanders.

A total of 22 people are detained in hospital as a result of the blasts. The IRA claims responsibility for the attacks by deliberately mirroring Prime Minister Margaret Thatcher‘s words a few months before when Britain entered the Falklands War. They proclaimed that “The Irish people have sovereign and national rights which no task or occupational force can put down.” Reacting to the bombing, Thatcher states, “These callous and cowardly crimes have been committed by evil, brutal men who know nothing of democracy. We shall not rest until they are brought to justice.” The bombings have a negative impact on public support in the United States for the Irish republican cause.

In October 1987, 27-year-old Gilbert “Danny” McNamee, from County Armagh, is sentenced at the Old Bailey to 25 years in prison for his role in the Hyde Park bombing and others, despite his plea that he is not guilty. He is released from HM Prison Maze in late 1998 under the Good Friday Agreement.

On May 19, 2013, 61-year-old John Anthony Downey, from County Donegal, is charged with murder in relation to the Hyde Park bomb and intending to cause an explosion likely to endanger life. He appears at the Old Bailey on January 24, 2014, for the beginning of his trial and enters a not guilty plea. On February 25, 2014, it is revealed that Downey’s trial has collapsed after the presiding judge has ruled upon a letter sent by the Police Service of Northern Ireland to Downey in 2007, assuring him that he would not face criminal charges over the attack. Although the assurance is made in error and the police realise the mistake, it is never withdrawn, and the judge rules that therefore the defendant has been misled and prosecuting him would be an abuse of executive power. Downey is one of 187 IRA suspects who receive secret on-the-run letters guaranteeing them unofficial immunity from prosecution.

A memorial marks the spot of the Hyde Park bombing and the troop honours it daily with an eyes-left and salute with drawn swords. A plaque commemorating the victims of the second attack also stands in Regent’s Park.