The new revelation comes as authorities in the UK are investigating the funding behind a pro-Brexit campaign, and whether it might have included illegal foreign donations. The National Crime Agency (NCA) is investigating the insurance executive and political donor Arron Banks, who was suspected by the UK’s Electoral Commission of not being the “true source” of £8m in funding to the Leave.EU campaign. The matter was referred to the NCA by the commission after it said it had “reasonable grounds” to suspect a number of criminal offences.