Found something already- Livingstone claiming Holyroyd & Wallace were both in Clockwork Orange here in an Independent article from 21 May 1999.

"My allegations were that a small group of MI5 and MI6 officers conspired to wreck the cease-fire negotiated between the Labour government and the IRA in February 1975"

"In the years that followed, I submitted more than 300 questions about the "dirty" war in Ireland and after years of denial, 'the government was forced to admit that the intelligence services had engaged in a covert black propaganda campaign, code-named Clockwork Orange'."

"Colin Wallace, a former Army intelligence officer who had been one of my two key sources of information, was found to have been framed for manslaughter and was eventually compensated.   'My second source', Captain Fred Holroyd, who worked for MI6, was discredited by being committed to a psychiatric hospital and has never received the compensation that is his due."

"The spymaster Peter Wright, of Spycatcher fame, 'makes no mention in his book of the extensive work he undertook in Ireland, yet he was the central figure among the group of MI5 officers trying to bring down the Labour government' [this being the allegation eminating from Holroyd, not Wallace].  I believe that the most likely scenario is that Wright and others directed the murder of Green and the Miami Showband killings in order to deny the minority Labour government the popularity that would have followed from its concluding a
peace deal with the IRA."

This facet of the alledged conspiracy against Wilson isn't currently reflected in the article nor to be fair in the Holroyd article.  Like I said, I will revert next week once I have the book from Holroyd-  then I will be able to quote direct from it and add further details to Holroyds allegations of a conspiracy against Wilson.  Thanks