The final Operation Kenova report also said there does not appear to be ‘any realistic opportunities’ for a fresh investigation into the atrocities.

Ten Protestant workmen were shot dead by the IRA outside the village of Kingsmill in 1976 in one of the most notorious incidents of the Troubles.

Ten Protestant workmen were shot dead in the sectarian attack by the IRA in Co Armagh in 1976.

McCauley is one of the so-called Colombia Three, accused of training rebel FARC guerrilla forces in 2001.