As he struggles with questions about the millions he has received from the billionaire Christopher Harborne, Nigel Farage has made no secret of his enthusiastic support for the industry that made part of his benefactor’s fortune – cryptocurrency. The Reform UK leader even urged the governor of the Bank of England to drop a crypto policy that may be costly for Harborne.

But another element of Harborne’s business interests could prove still more consequential if it shapes Farage’s positions. There appears to be no precedent for a major UK donor who is so entwined with the military.

The Guardian’s ongoing investigation into the origins of Harborne’s riches and whether his donations inform Farage’s agenda has established the Thailand-based tycoon’s global web of commercial interests in the arms industry and military contracts. Among Harborne’s business collaborators are a striking number of former army officers, air force pilots, military officials and even, it seems, a former MI6 officer.