A protester from Brighton threw green slime over Lord Mandelson today as he arrived at the launch of the Government's low-carbon economy summit in London.

Leila Deen, an activist from the campaign group Plane Stupid, was behind the stunt, a spokesman for the group said.

She walked away after the incident.

Lord Mandelson said: “She was so busy throwing what seemed like green soup or something in my face that she failed to tell me what the protest was about but, as you can see, thankfully it wasn't paint and I've come through it intact.”