Mr Clark says he took this decision "to keep the border strong rather than to weaken the border".

BBC: Q&A: Brodie Clark and the UKBA border checks row

Mr Clark says he became aware in early 2011 that staff at Heathrow were foregoing fingerprint checks rather than Warnings Index checks.

BBC: Q&A: Brodie Clark and the UKBA border checks row

Mr Clark says the store's expansion, which will increase non-food floorspace to more than 2600 sq m (27, 986 sq ft), will put Sainsbury's in direct competition with a number of town centre shops.

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"No one ever makes any money from their cheese board, as they are incredibly expensive to maintain we import fresh cheese two or three times a week, " Mr. Clark says.

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Mrs May allowed some checks on European travellers to be relaxed but says Mr Clark went further, scaling back checks on non-EU nationals without her approval.

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By 2000, says Mr Clark, entertainment was Chicago's main industry.

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Mr. Clark, an aviation buff who says his "zen space is at 41, 000 feet, " co-founded Aviation Partners in 1991.

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