- 1987, 1990 (Creation)
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The company was registered in May 1975 as Robertson Research Holdings Ltd. It was the major equity holder and controlling organisation of the Robertson Research Group, the geological research and consultancy arm of William Robertson Shipowners Ltd. It operated through a number of subsidiary companies.
In March 1984, it was reregistered as a public company called Robertson Research plc. In October 1987, it was renamed Robertson Group Ltd. In 1988, it was renamed Robertson Group plc. In 1991, it was taken over by Simon Engineering plc. In April 1996, it was renamed RBLC (No.4) 1996 Ltd.
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