An ecumenical service against climate change will take place in central London next month to highlight the threat posed by climate change.

The service will be part of the London Campaign against Climate Change rally and march. Ann Pettifor, Campaign Director of Christian environmental coalition Operation Noah, will deliver a keynote speech about the threat posed by climate change.

Following the service, Christians from all walks of life will join other faith groups and march from Westminster to the American Embassy in Grosvenor Square.

Campaigners will demand that British and world leaders take the urgent action needed to prevent catastrophic climate change.

The national demonstration in London will be one of many demonstrations on climate change taking place all around the world on the same day, midway through the United Nations climate talks in Bali, where world leaders will be discussing the threat from global warming and how the world can respond to it.

Operation Noah encourages all its supporters as well as other Christians concerned about climate change to join in the service and the march.

Operation Noah's co-chair, Reggie Norton, says: "Leaders in Britain and across the world have not yet faced up to the gravity of the threat from climate change.

"By coming together on 8 December, we can all help build the momentum to pressure politicians for bold, meaningful action on climate change through legislation to regulate, equitably share and ration carbon emissions."

Last year, several hundred Christians attended a crowded church service prior to the start of the climate change rally at Grosvenor Chapel in central London. The service was organised by members of Christian Ecology Link in co-operation with Operation Noah and Churches Together in Britain and Ireland.

This year's service will take place on 8 December at St Matthew's Church, Great Peter Street, Westminster at 11 o' clock.