Hate preacher Anjem Choudary launched a vitrolic attack on gays last week in which he said that they should be stoned to death.

The former lawyer, who lives on benefits, added that this would include gay business secretary Lord Peter Mandelson, who, under Sharia law, would first be educated about the “evils” of homosexuality then executed if he confessed to a same-sex relationship.

He was speaking at a press conference in London organised by Islamic extremists to justify a protest in Luton last week against soldiers returning home from Iraq.

Choudary said: “If a man likes another man, it can happen, but if you go on to fulfil your desire, if it is proved, then there is a punishment to follow. You don’t stone to death unless there are four eyewitnesses. It is a very stringent procedure.

“There are some people who are attracted to donkeys but that does not mean it is right.”

Conservative MP Patrick Mercer told the Daily Mail: “These statements show the depravity of this man’s beliefs. They must incite hatred and encourage terrorism, and I would encourage the Metropolitan Police to investigate them as rigorously as possible.”

A Scotland Yard spokesman said police would investigate Choudary’s remarks if a complaint was made.

Choudary has previously called for Sharia law to be implemented in the UK.

Last week, he called for all British women to be forced to wear burkhas, saying: ““Every woman, whether Muslim or non-Muslim, would have to wear a traditional burkha and cover everything apart from her face and hands in public.

“In matters to do with the judicial system and the penal code, one male witness is sufficient to counter the testimony of two females. People who commit adultery would be stoned to death.”