He has also built up a multi-million pound business advising banks and foreign governments, which helps to fund a network of charitable foundations devoted to promoting inter-faith dialogue and other causes.

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He also argued that the skills base already built up in the north east of Scotland in the energy sector provided a "platform from which the industry can develop".

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He also likes pipeline operators like Oneok, Enterprise Products and Buckeye, which are gobbling up superb assets that were often built by large oil companies and utilities.

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