lights out london gets monumental support

We've been overwhelmed by the amount of people who have signed up to lights out London. But it's not just all you fantastic listeners who've been keen to get involved - some of our best-known buildings will be switching off on June 21st too. Canary Wharf, The National Portrait Gallery, BT Tower, The National Theatre, Harrods, City Hall, The Ritz, The Savoy and even Buckingham Palace have already confirmed their participation. We're sure the Queen will be celebrating in suitable style!

Here are some of the famous buildings and businesses that have already signed up:

• Buckingham Palace
• Clarence House
• National Portrait Gallery
• BT Tower
• Harrods
• Canary Wharf
• ITV
• The Clink Museum
• Millennium Hotel - Brian Turner's restaurant.
• Lindsay House
• Zilli Fish restaurant
• Emap Magazines
• GCap Media
• City Hall
• Savoy
• The Ritz
• Sustainability Exchange
• Fujitsu UK
• The National Theatre
• Associated News
• IPC Media
• Hachette Publishing
• Ashdown House DCLG
• Clarence House
• Houses of Parliament