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IRA infiltrator 'abandoned' by MI5

9 October 2012 Last updated at 07:16 BST

A secret agent who infiltrated the IRA for the British security services says he has been abandoned by MI5 and left with mental health problems.

Raymond Gilmour, who has lived under a false identity for 30 years, says his handlers promised him £500,000, a new home, psychiatric support and a pension.

But instead he said he received modest accommodation and £600 a month for only three years, and claims to have suffered alcoholism and post-traumatic stress disorder.

Colin Campbell reports.