People close to IDS began attributing the leaking of the document to the party's Chief Executive Mark MacGregor, as well as his close friend Robbie Gibb, a Newsnight producer.
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In May 2002, investigative journalist on BBC Newsnight programme, Michael Crick, had initiated an investigation on the pay received by Mrs. Duncan Smith, and asserted that the pay was not commensurate with the duties she performed during the period from September 2001 to December 2002.