Lillford, now a biology professor at the University of York, was chief scientist at Unilever when it supplied the first GM products to UK supermarkets.
"We spent a lot of time educating the market and people bought it," he said. But as scare stories circulated in the face of public unease, Unilever pulled out, he said.
"We won't go back unless we can persuade the public of the benefits."
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