Who leaked the Hadley CRU files and why

The anonymous tipster, whom many people initially assumed had "hacked" into the computers at the Climatic Research Unit (CRU) of the University of East Anglia (repeatedly called the "Hadley Centre" by mistake), was probably an insider, seeking to expose certain sharp practices and unscientific methods of his bosses.

Source:
http://www.examiner.com/x-28973-Essex-County-Conservative-Examiner~y2009m11d21-Who-leaked-the-Hadley-CRU-files-and-why