On television, Seddon has reported for the BBC from inside Iraq, North Korea and China, as well as for Sky TV from Yemen and for Al Jazeera English from North Korea, Syria, Dr Congo, Kenya, Ethiopia and Haiti. Seddon also reported regularly from the United Nations and from the White House, and has lectured widely in North America and the UK. He became the United Nations and New York City correspondent for Al Jazeera English in 2005, having helped set up and run the first ever Aljazeera English TV New York Bureau. He later returned to the UK to continue as Aljazeera English TV's Diplomatic Correspondent. He was an early guest on "Have I Got News for You", and has appeared as a commentator on numerous UK and US television and radio programmes, including "Newsnight", "Channel 4 News", "Breakfast with Frost", "The Politics Show" and the "Today" programme.