Thousands of people are expected to converge on the city today for a protest calling for climate change action. With the general election getting closer, demonstrators will be calling for climate change to be put at the top of the political agenda.
The march will bring together groups who campaign on both social and environmental issues. It builds on the People's Climate March in September last year, which was attended by tens of thousands of people. The march begins at Lincoln's Inn Fields and will head towards Parliament where there will be a rally with keynote speakers.
Do you know where you'll be waking up on Christmas morning? Well one teenager who grew up in London certainly does - he's hoping to spend the day in the South Pole, hundreds of miles from civilisation. 19-year-old Parker Liautaud is attempting to break the record for skiing across Antarctica.
Along the way he'll also carry out scientific experiments to investigate the impact on climate change on the area. Martin Stew went to meet him as he made his preparations - next to Tower Bridge.
Born in California in 1994 to French and American parents, but grew up in London after his family moved to the UK
First Arctic expedition at 14 years old alongside renowned explorer Sir Robert Swan OBE
In 2009 attempted to become the youngest person to walk to the North Pole, at 15 years old- but the expedition was cut short due to weather conditions
By the age of 18 he had completed three expeditions to the North Pole
Currently studying Geology and Geophysics at at Yale University
Teenager Parker Liautaud, who grew up in London, has announced today he is going to attempt to break the land speed record for crossing Antarctica - at just 19 years old.
He wants to cross from the Antarctic coast to the South Pole in 22 days, meaning he'll have to notch up over 18 miles a day in temperatures as low as -35°c.
He'll also be gathering snow samples along the way to help with research into climate change.
David Vaughan of the British Antarctic Survey says the new research on flooding means planners will be able to make preparations to protect London.