Jeremy Corbyn branded Nato a "danger to world peace" and was once arrested after joining a sympathy protest for the IRA, it emerged today.

The Labour leader was filmed in January 2011 describing Nato as a "major problem" and warning that the organisation’s power must be curbed.

It also emerged that Mr Corbyn was arrested in 1986 after taking part in an IRA-linked demonstration outside the Old Bailey to “show solidarity” with a group of people accused of being terrorists.

Julie Hambleton, whose teenage sister Maxine was among 21 people murdered in the 1974 Birmingham pub bombings, said his support for the IRA made her "blood boil", adding that he was unfit to be Prime Minister.