Today's attack in Whitehall was both vicious and futile, since it will neither intimidate nor divert anyone, whether in government or opposition, in this democracy. May I express my relief at the fact that the attack caused so little harm to people, my admiration for the workers in Whitehall who continued with their duties, and my appreciation of the emergency services who responded with great speed and expertise? Today's experience further increases our fellow feeling for the people of Northern Ireland who have lived with such atrocities for nearly two decades. May I put to the Prime Minister my firm view that outrages such as the one today increase the unity and determination that we all share to defend democracy and defeat terrorism, whatever its source.