 Hannigan haasati ataura nezvebasa rake muNorthern Ireland runyararo asi ndiye chete mushandi wehurumende yeBritain anobatanidzwa kuti asarudzwe mubhuku raTony Blair, apo Blair anomurondedzera se mukuru wechidiki mukuru uyo akanga atora sechinhu chikuru Nhamba 10 munhu kuNorthern Ireland uye anomuti semuenzaniso wekusika. Hannigan anoonekwa nguva dzose mune dzimwe nhoroondo, kunyanya naBlairs Chief of Staff Jonathan Powell, achipinda misangano yakavanzika yedambudziko nevatungamiriri veIrish Republican, kusanganisira Gerry Adams naMartin McGuinness, kuStormont Castle neClonard Monastery. Powell anorondedzera basa rake rinokosha mukuita chibvumirano naIan Paisley neDemocratic Unionist Party panguva uye mushure memisangano yeSt Andrews Agreement. Anotsanangurwa seari kutungamira musangano wekutanga pakati peDUP neSinn Féin uye akagadzira tafura yakaumbwa nedhaimani yakaunza Adams naPaisley pamwe chete pamusangano weveruzhinji musi wa26 Kurume 2007, uyo unofungidzirwa zvakanyanya sekumaka kupera kweNorth Ireland Matambudziko.. 