Climate protesters march in London

Thousands of people have marched through central London calling for a deal on climate change at next week's conference in Copenhagen, Denmark. Police said about 20,000 people participated in the event, which began on Saturday at Grosvenor Square, while organisers put the turnout at above 40,000. Organisers, Stop Climate Chaos Coalition, which includes groups such as Oxfam, Greenpeace and Friends of the Earth, asked protesters to dress in blue to symbolise a wave. The march climaxed with a mass "human wave" around parliament. Similar protests were held in Glasgow, Belfast and Dublin, Ireland. Tim Friend, Al Jazeera's correspondent in London, said: "There's a carnival atmosphere here ... What they've succeeded in doing is encircling the Palace of Westminster and performed this great wave.