From the Independent:

The then Prime Minister, Tony Blair, stated this on 29 January 1998: “I am setting up the inquiry because the relatives of those that died that day have the right to expect us, their government, the British Government, to try to establish the truth of the events of that day. I am interested in their interests, their concerns and their sense of grievance, not in the sense of grievance of people who’ve engaged in terrorist acts.”