London, England SW1A 1AA

On Saturday 27 March at 8.30pm, millions of people around the world are turning off their lights for one hour to show policy makers and politicians they care about climate change.

This year's event is going to be bigger than ever and in London it promises to be particularly spectacular – just some of the major landmarks signed up to switch off include:

- Buckingham Palace
- Houses of Parliament
- Big Ben
- The Gherkin
- Canary Wharf
- The Coca-Cola sign in Piccadilly.

Get out and about in town to catch the event and help make London's message on climate change even stronger - just sign up online and get ready for the big switch-off!

Sign up here:

Added by WWF UK on March 24, 2010