Greenpeace investigators say the firm, which also donated to the Conservatives, will be sole beneficiary of rule changes on importing raw cane sugar

The government has been warned to abandon its proposed tariff-free quota for raw cane sugar imports because of its potential to undercut UK growers.

The vote to leave the EU has sparked a clash between sugar-cane importers and farmers producing homegrown sugar beet. Is this bitter skirmish a microcosm of the big battles to come?

They produce half the country’s sugar needs, but expect new trade deals to make their tough situation worse.