After the success of the recent rally in Coventry, it is vital to keep the ball rolling on climate change, says UK-based international development and advocacy agency Christian Aid.
It is promoting the 'Countdown to Copenhagen' pledge  and encouraging people to write to their parliamentary representatives.
"An amazing day saw Christian Aid and its allies from the Stop Climate Chaos coalition join together to demand climate justice as we count down to crucial UN talks in December," a spokesperson declared.
The day on 19 March 2009 kicked off with a joint service with CAFOD at Coventry Cathedral. Participants heard about the danger of climate change from campaigner James Galgallo from northern Kenya and world renowned climate scientist James Hansen.
In his sermon, the Anglican Bishop of Liverpool, the Rt Rev James Jones, said: "The climate is changing and there is no justice in the change. Those most affected by the changing climate are powerless to do anything about it; and those who have the power to make a difference don't yet feel the full disastrous effects."
The numbers then swelled to more than 1,200 as the rally was joined by Stop Climate Chaos coalition members in a New Orleans-style funeral procession through the city centre.
While jazz band Jamablaya added a colourful note, campaigners carried coffins and wreaths in keeping with their message: that climate change is a matter of life or death.
Speakers addressing the crowds at the end included Christian Aid Director, Daleep Mukarji, and actress and environmental campaigner Greta Scacchi.
The day was brought to a close with a rally, organised jointly with the World Development Movement, outside the headquarters of E.ON, the company behind the planned Kingsnorth coal-fuelled power station.
Behind them the protestors left one last memo, a wreath spelling out the starkest of epitaphs: ‘coal kills’.