Boris Johnson witnessed a mid-air drama after cabin crew restrained an aggressive passenger described as being 'off his head' while singing loudly.
The Mayor of London was heading back from the Far East with his trade delegation when the unexpected events began to unfold at 35,000 feet.
The mayor sat near the abusive passenger to try to calm him down. But he became increasingly abusive and was eventually restrained by cabin crew.
Eileen Burbidge was among those travelling with Boris Johnson. She said she was impressed with the "amazing professionalism" of the crew and the way they handled the passenger who was, as she put it, "off his head".
Speaking to BBC News, passenger Tom Oakes said: