Clips from this interview feature in As I Remember It: Bertie Ahern & the Good Friday Agreement #GFA25.

Martin Mansergh served as a Fianna Fáil TD between 2007 and 2011 – but played a key role in the party’s policy on Northern Ireland in the years before that.

While working in the Department of Foreign Affairs he was recruited into Fianna Fáil by then-Taoiseach Charles Haughey.

He served under three other Fianna Fáil leaders as Director of Research, Policy and Special Advisor on Northern Ireland.

MARTIN MANSERGH AT GOVERNMENT BUILDINGS DURING A MEETING WITH TAOISEACH BERTIE AHERN AND A DELEGATION FROM THE SDLP.1/10/98.PIC EAMONN FARRELL/PHOTOCALL IRELAND

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For Bonus content including interviews, videos, an interactive timeline of the peace process and a full glossary off the key players head to newstalk.com/goodfridayagreement.