The mystery man who was photographed enjoying a rollercoaster ride with North Korean leader Kim Jong-Un has been identified as a young British diplomat.
The picture, released by state media last week, showed Mr Kim smiling and a Westerner in front of him also looking happy and flanked on both sides by what appeared to be regime officials.
Foreigners are rarely seen with the leader and the man's appearance led to much speculation as to who he was.
He has now been revealed as Barnaby Jones, a junior diplomat based at the British embassy in the capital Pyongyang.
The Foreign Office accepted it was an "unusual event" but added it was part of diplomatic moves with the reclusive regime recently inherited by Mr Kim after his father's death.
It said: "Pyongyang's diplomatic community was invited to the opening of the Rungna People's Pleasure Ground. This included the charge d'affaires of the British Embassy, who accepted the invitation to attend.
"While this was an unusual event, it is vital that we actively engage with the North Korean administration since we work closely with them on a number of humanitarian, cultural and education projects which benefit the people of North Korea."
Diplomats from several countries accompanied Mr Kim on the rollercoaster ride at Pyongyang's Rungna amusement park, the British embassy confirmed.
Meanwhile, Mr Kim hosted a dinner in Pyongyang for senior political officials visiting from China, state media said, in what marked his diplomatic debut and a sign that he is turning his attention to foreign affairs.
Mr Kim held talks with a Chinese delegation led by Wang Jiarui, head of the Communist Party's international affairs office, and then invited the group to a dinner attended by North Korea's political elite, according to the state-run Korean Central News Agency.
The photograph of the young leader on the rollercoaster was among a number circulated as part of an apparent campaign to build an image of a relaxed and informal leader.
Official media has also disclosed Mr Kim's marriage and carried photos of him arm-in-arm with his wife - a marked departure from the secrecy surrounding the private life of his father Kim Jong-Il, who died last December.
In contrast to his late father, who spoke just once at a major public event during his 17 years in power, Mr Kim has cultivated an outgoing style.
He has been seen hugging soldiers, posing for photos with troops and linking arms with women.
Unusually, in a nation which officially regards the United States as its arch-enemy, a recent concert attended by Mr Kim featured Mickey Mouse and other Disney characters.