At the MoS he broke the story of the renegade MI5 officer David Shayler, and for the Sunday Times he covered the story of Richard Tomlinson, an MI6 whistleblower (Fielding is the author of the introduction to Tomlinson's book The Big Breach).
Tory minister Michael Mates was forced to resign after Fielding revealed he had given fugitive financier Asil Nadir an inscribed watch.
[1] At the Sunday Times he played a significant role in the recovery of a stolen Enigma coding machine from Bletchley Park.
Together with al-Jazeera journalist Yosri Fouda he reported the only interviews ever freely given by the main organisers of the 9/11 attacks on America – Ramzi bin al-Shibh and Khalid Sheikh Mohammed.
[2] He was launch editor for the online magazine, China Outlook, and he writes the Circling the Lions Den blog about Afghanistan.