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Northern Ireland's richest man Edward Haughey was among four people killed when a civilian helicopter crashed in eastern England on Thursday evening, the pharmaceutical company he owned said on Friday. Among them was Haughey, 70, a member of Britain's upper house of parliament who was Northern Ireland's richest man with an estimated wealth of £600 million, according to the Sunday Times newspaper's annual Rich List. Haughey, who also served in the upper chamber of parliament in the Irish Republic where he was born, was the founder and chairman of Northern Ireland-based Norbrook Laboratories, the largest privately owned pharmaceutical company in the world. The company employs over 1,700 people and former Northern Ireland economy minister Reg Empey said Haughey had brought quality employment to the British province during the "darkest days" of its 30 years of paramilitary violence.