The Iranian Holocaust Conference currently being held in Tehran has attracted the usual collection of sceptics, deniers and cranks. The two-day event, initiated by President Mahmoud Ahmadinejad, aims to discuss whether six millions Jews were killed by the Nazis in the 1930s and ‘40s and the existence of gas chambers in the death camps.

The Iranian foreign ministry has said that 67 foreign researchers from 30 countries were allowed to participate, and included notorious Holocaust denier and Adelaide resident, Frederick Tobin (who brought a model of Auschwitz that allegedly “proved” the absence of gas chambers there), Michele Renouf, an Australian socialite who supports “Holocaust sceptics” and David Irving, former Ku Klux Klan leader David Duke and a host of other notorious figures. One Palestinian dissenter was refused entry.