Hundreds of minicab drivers have been protesting against an upcoming congestion charge which they say will cut their take home pay by as much as 25%.
The demonstration outside TfL's offices was called by the Independent Workers Union of Great Britain who say the charge - which is due to come in in April - will do little to reduce congestion in the capital.
In response the Mayor Sadiq Khan has described the air in quality in London as a 'public health emergency' saying tough decisions need to be made protect the health and wellbeing of Londoners.
Transport for London's Director of City Planning, Alex Williams, has also reacted saying:
'More than 9,000 deaths are linked to air quality every year. The changes to the congestion charge and the introduction of the Ultra Low Emission Zone in April will significantly benefit the health of all Londoners.'