Tony Blair issued a brief statement just after 3.40pm today. He said he had taken a Cobra meeting at 2.30, and just spoken to the Met police commissioner.
"We can't minimise incidents such as this," he said. "We know why these things are done. They're done to frighten people and make them anxious and worried."
"Fortunately there appear to have been no casualties. We've just got to react calmly, get on with our business as normal."
He said that, following the press conference, he would be going back to his previously planned schedule.
