"Nigel Farage's party said this would apply to any country developing a formal approach and the ban would cover all visa types, including ones for visitors and work.

"Britain transported an estimated three million African people across the Atlantic before abolishing the practice in the early 1800s."

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Reform would deny visas to countries seeking slavery reparations

The party says it wants to put African and Caribbean countries "on notice" after a vote at the UN last month.

BBC News (www.bbc.co.uk)