BBC News, this is Mike Cooper.

Police in London have launched a criminal investigation into student protests in the capital over the past month, which

culminated

in an attack on Prince Charles and his wife on Thursday night. The investigation aims to find those responsible for the violence. Here's Danny Shaw.

Detectives are now viewing CCTV footage to identify those responsible for the violence. Although most are believed to be students, police believe groups of youths looking for trouble joined in even though they had no interest in the issue of tuition fees. It's emerged that one of those involved was the adopted son of the Pink Floyd guitarist, David Gilmour. Charlie Gilmour, who's at Cambridge, admitted climbing the Cenotaph and swinging from a Union Flag. He said he was deeply

ashamed of

his behaviour.

The UN climate change summit in Cancun, Mexico is

drawing to a close

with no agreement so far on future cuts to greenhouse gas emissions. Some rich countries have been resisting calls for further cuts under the Kyoto Protocol. Richard Black is in Cancun.

Japan appears dead set against accepting further emission cuts under the Kyoto Protocol; so does Russia. But developing countries say those nations must

uphold

promises they made a decade ago. The US and other western countries want the World Bank to control money raised to help poorer countries deal with climate change. Those developing countries can't accept that as they