We'll have the latest on the investigations into the London bombings: details about the fourth suicide bomber are emerging, and more victims are being formally identified. Follow Tony Blair's answers to MPs' questions in the Commons here.
In other news, thousands of protesters are marching in Manila demanding the resignation of the President Gloria Arroyo; Australia is sending troops to Afghanistan; and science editor Tim Radford blogs here about the space shuttle Discovery, which is being launched tonight.
