IAN Paisley was described as a schizophrenic ready to adopt the IRA's 'Brits Out' mantra if he did not get his way on Northern Ireland politics, state papers claim.
According to a report released under the 30-year rule, secretary of state for Northern Ireland James Prior believed that the Democratic Unionists were less prone to splits and division because of the leader's domination.
Mr Prior was reportedly angered after being targeted by DUP figures in a Derry city hotel.
His hardline views on Mr Paisley were recorded in Department of Foreign Affairs files following a meeting with former Minister for Foreign Affairs Peter Barry at Hillsborough on October 19, 1983.
"Mr Prior said that there were people like Paisley who were schizophrenic," a report of the meeting shows.
"The DUP had attacked him some time ago at the Everglades Hotel in Derry in the same fashion as the Forum delegation were treated."