Published: Jun 24, 2016, 03:53 IST | Updated: Jun 24, 2016, 03:53 IST
Martin Sorrell, the boss of the world's biggest advertising group WPP, said: 'This decision will create tremendous uncertainty, which will slow economic activity and decision making.'
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Big business wanted to remain in the world's biggest trading bloc because of ease of access to 500 million European consumers