The oldest UK walker is 68 year-old Hereford grandmother, Merryn Hellier, while other marchers include a businessman and South African bishop, who has walked in his cassock.
Along the route, marchers have lobbied MPs to strengthen the government climate change bill; they have also met with businesses across the country, urging companies such as the Royal Bank of Scotland and Tesco, to cut their carbon emissions.
The marchers are calling on the UK government to commit to a UK cut of at least 80 per cent in carbon emission by the year 2050 in the climate change bill. They want business to publish their emissions annually and reduce their emissions by five per cent year on year.
Celebrities including Leonardo DiCaprio, Lemar, Terra Naomi and Greta Scacchi have publicised their support for the march, sung at rallies in key British cities including Edinburgh, Leeds, Birmingham and Cardiff, or walked with the marchers, urging government and businesses to Cut the Carbon.
Marchers have lobbied at the Labour Party Conference in Bournemouth and gone to church with the Prime Minister. Two international marchers - Mohammed Adow, 28, from Kenya and Rosalia Soley, 22, from El Salvador, met Gordon Brown.
Rosalia said she chose to go on the march because of the effects of extreme climate on the poor in her country. "The climate in El Salvador has gone completely mad," she said. "Some years there isn't enough rain and people lose their harvest because of drought, other years there's too much and the crops are washed away. It never used to be like this."
Cassia Bechara from Brazil said of the march: "We have started a process in British society of broadening the debate about climate change and its causes and consequences. But this is just a beginning.
"We believe this process will turn into a mass movement, where people will take collective actions to tackle climate change."
