in a Landrover, which detonated a landmine on track, Brougher Mountain, near Trillick, County Tyrone. A British Army mobile patrol was reportedly the intended target. The five were on their way to inspect a transmitter: two of the dead men were BBC engineers, the other three were construction workers. The landmine was intended for a British Army patrol that usually inspected the transmitters. 26 February 1971: Two RUC Special Patrol Group officers, Robert Buckley (aged 30) and Cecil Patterson (aged 45), were killed in a gun battle with the IRA while on Royal Ulster Constabulary mobile patrol, Etna Drive, Ardoyne, Belfast. March–April 8 March 1971: Provisional IRA volunteer Charles Hughes (26) was shot dead by the Official IRA, while leaving a house on Leeson Street, Lower Falls, Belfast; part of an ongoing dispute between the Provisional IRA and the Official IRA. In response the Provisional IRA shot and seriously injured an Official IRA volunteer. 9 March 1971: the Provisional IRA kidnapped three off-duty Scottish soldiers (John McCaig, Joseph McCaig, and Dougald McCaughey) in Belfast, brought them to a mountain road outside the city and shot each in the head. They were the first off-duty soldiers from Britain to be killed in the conflict. 21 April 1971: the Royal Navy survey launch Stork, attached to HMS Hecate, was towed to open seas and sunk by an IRA unit in Baltimore, County Cork. May–June 15 May 1971: IRA volunteer Billy Reid was killed during a gun battle between the IRA and the British Army on Academy Street, Belfast. Two British soldiers were wounded in the incident. 25 May 1971: a bomb was thrown into Springfield Road British Army/RUC base in Belfast, killing British Army Sergeant Michael Willetts as he shielded civilians from the blast with his body. He was posthumously awarded the George Cross. Seven RUC officers, two British soldiers and 18 civilians were injured. July–August 12 July 1971: a British soldier (David Walker, aged 30) was shot dead by an IRA sniper at a British observation post on Northumberland Street, Lower Falls, Belfast. The IRA claimed his death was in retaliation for the killings of two civilians in Derry by the British Army the previous week. 14 July 1971: a British soldier (Richard Barton, aged 24) was shot dead in an IRA ambush on a mobile patrol in Andersonstown, Belfast. Three IRA gunmen using automatic weapons fired at least 35 shots