More than 1, 000 cyclists and drivers have staged what they've called a 'die-in' - protesting at dangerous traffic conditions on London's roads.
They blocked roads outside the Transport for London headquarters in Southwark as pat of a vigil to remember six cyclists who died over the last month.
Donnachadh McCarthy was among the organisers of the Stop Killing Cyclists protest. He said it was inspired by riders in Holland:
London Mayor Boris Johnson praised their efforts:
Amateur footage in this report is courtesy of www.youtube.com/sw19cam