A British businessman accused of spying for China reported to a high-ranking intelligence officer closely linked to President Xi Jinping, The Mail on Sunday has learned.

John Miller, who the MoS last week revealed was the subject of an FBI sting operation, was arrested with his 'handler', Cui Guanghai, just hours before they were due to board a flight to Beijing.

Both men are accused of trying to buy weapons and sensitive military technology in the United States for the People's Liberation Army.

This newspaper can now reveal that Cui, 43, is an Edinburgh University graduate suspected of working for China's military intelligence and described as 'important' to President Xi.

Court documents claim Miller, a 63-year-old recruitment specialist from Tunbridge Wells, was 'working for and being directed by' Cui. The two men were once pictured together in London's Chinatown. Other images on social media show Cui and his wife at locations in Edinburgh, Dublin and London, including the Houses of Parliament.