Williamson was given 10 days to leave Argentina by the government or risk expulsion [AFP]
A British Roman Catholic bishop who caused outrage by denying the extent of the Holocaust has arrived in London after he was ordered to leave Argentina, where he had headed a seminary.
The 68-year-old ultra-traditionalist bishop has been at the centre of controversy after he denied the use of gas chambers on Swedish television in January.
"There was not one Jew killed by the gas chambers. It was all lies, lies, lies," he said.
Williamson also said he believes no more than 300,000 Jews died in Germany's Nazi concentration camps.
The number of those killed in the Holocaust that is widely accepted is six million people.