Waved, whistled and roared, now we want action

More than sixty thousand people, marched through London and Glasgow on Saturday as part of The Wave. Thank you to every one of you. This makes it the UK's biggest demo on climate change, sending a clear signal to our Government and world leaders.

In London, we set-off from Grosvenor Square and to the beat of drums, accompanied by trumpets, horns and whistles, surged on "wave" like through Berkley Square, Picadilly and Trafalgar Square.

When I reached Westminster tube station, the line of people stretched back up the Mall as far as I could see, but had already passed through Parliament Square, past the Palace of Westminster. It went on, snaking across Lambeth Bridge, along the Southbank, looping back on itself across Westminster bridge, encircling any MP's inside Parliament. As Big Ben struck three, we roared and whistled to speak up for nature and for those who couldn't make it for the march.

This was a demonstration of public frustration and anger for the lack of action to tackle climate change. The RSPB, as part of the Stop Climate Chaos Coaltion, is calling for ministers to go to Copenhagen to agree a fair, binding and ambitious plan.

People of all ages and from the UK's diverse communities came together for this event.

There were several political parties, lots of faith groups, Unions, NHS workers, students, social and community organisations and environmental campaigners; all united by this one important cause.

Is it enough to convince politicians here and around the world to do something serious? We'll find out at the conclusion of the Copenhagen talks.

What we called for today was a conclusion that will be:

Fair. We need huge investment to help countries most at risk from the impact of climate change. Mind you, that's a smaller investment than we've seen thrown at the world's banks. We need developed countries to agree to deep cuts in carbon emissions. We'd like to see 40% cuts by 2020 in the UK.

• Binding. We need agreements that don't allow nations to back peddle, monitored and enforced by an international mechanism.
• Finally we need to be ambitious in our aims. Quitting the reliance on coal and investing in clean energy sources is a must. But we don't want blind development of windfarms or tidal energy. We must learn from history and ensure that new energy sources don't come at the expense of the environment.

 If you weren't one of the 60,000 people in London, Glasgow or Belfast.. then don't despair. There's still a way for you to make your voice heard. Sign our Letter to the Future. As with the march, numbers are important. As we head towards a general election we will have to show that there is huge public support for change, when investment in energy, services and development doesn't, literally, cost the Earth.