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He portrays himself as an international man of mystery. Arron Banks' van and car insurance and finance empire spreads from Catbrain Lane in Bristol to Gibraltar to the Isle of Man.

He's supposedly the biggest single political donor in British political history, giving millions to the Leave campaign.

But there are allegations he's too close to Russia - allegations he hotly disputes. John Sweeney has been looking at the evidence.

(Image: Arron Banks, credit: ÃÛÑ¿´«Ã½)