In 2003, Seddon was the first journalist to reveal that 'extraordinary rendition' had taken place in the British Indian Ocean Territory island of Diego Garcia. He repeated the claims for al Jazeera English TV, shortly before the then Foreign Secretary, David Miliband, admitted that extraordinary rendition had indeed taken place using the island of Diego Garcia. Seddon was also the first foreign reporter to broadcast live from Pyongyang, the North Korean capital, in 2006, soon after performing the first trans Atlantic 'live' from the United Nations in New York to Doha for al Jazeera English TV at the time of that Networks' launch. He is a former Vice President of the United Nations Correspondents Association.