Mortars and automatic grenade launchers have no respect for gated communities or security guards.
“The Downing Street mortar attack was carried out by the Provisional Irish Republican Army (IRA) on 7 February 1991. The IRA launched three homemade mortar shells at 10 Downing Street, London, the headquarters of the British government, in an attempt to assassinate Prime Minister John Major and his war cabinet, who were meeting to discuss the Gulf War.”
“One of the 140 pounds (64 kg) mortar shells exploded in the back garden of Number 10, yards from the Cabinet Office. Due to the bomb-resistant windows, none of the cabinet were hurt, though four other people received minor injuries, including two Metropolitan Police officers. The other two shells overshot Downing Street and landed on a green nearby.”
“An IRA co-ordinator procured the explosives and materials needed to make the mortars. The unit began making the mortars and cutting a hole in the roof of the van for the mortars to be fired through. They reconnoitred locations in Whitehall to find a suitable place from which the mortars could be fired at the back of 10 Downing Street, the official residence and office of the British prime minister.”
“In November 1990, Thatcher unexpectedly resigned from office, but the Army Council decided the planned attack should still go ahead, targeting her successor John Major. The IRA planned to attack when Major and his ministers were likely to be meeting at Downing Street and waited until the date of a planned cabinet meeting was publicly known.”
“On arrival, the driver parked the van and left the scene on a waiting motorcycle. Several minutes later at 10:08 am, as a policeman was walking towards the van to investigate it, three mortar shells were launched from a Mark 10 homemade mortar, followed by the explosion of a pre-set incendiary device. This device was designed to destroy any forensic evidence and set the van on fire. Each shell was four feet six inches (1.4 m) long, weighed 140 pounds (60 kg), and carried a 40-pound (20 kg) payload of the plastic explosive Semtex.”
https://en.wikipedia.org/wiki/Downing_Street_mortar_attack
“The improvised mortar properly called “barrack buster” - known to the British security forces as the Mark 15 mortar - fired a 1 metre (3 ft 3 in) long metal propane cylinder with a diameter of 36 centimetres (14 in), which contained around 75 kg (165 lb) of home-made explosives and had a range of 75 to 275 metres (246 to 902 ft).”
https://en.wikipedia.org/wiki/Barrack_buster
A legitimate attack on the leadership of an army whose troops were an occupying force in their home country, much like the Ukrainian attacks on Moscow.
I rooted for the IRA to kill British troops until they started blowing up pubs full of civilians to take out a few soldiers. If we were invaded and occupied, I'd be out there ambushing the occupiers, so I can relate.
But the IRA leadership eventually went Marxist, which soured me on them. I still sing their songs in the pub, though!