Foreign Affairs Committee - House of Commons
Report on
Foreign Policy Aspects of the War against Terrorism

The report includes the evidence taken on 11 February which related specifically to Iran. Some of this evidence covered the Iraqi based Mojahedin organization.

DR ALI ANSARI, Lecturer in the political history of the Middle East, University of Durham
gave verbal evidence. Questions 68 & 69 refer to the Mojahedin.
Examination of Witness (Questions 60 - 79)
 

Information was also submitted by Iran-Interlink including a statement by Massoud Tayebi a former member of the Mojahedin who escaped their base in Iraq in 2002.
Memorandum from Iran—Interlink

Concerns were raised by the Iranian Ambassador in London about the reports of Mojahedin and US complicity following the war in Iraq. These are discussed here:
Further memorandum from the Foreign and Commonwealth Office