Protesters against the expansion of London's Ultra-Low Emission Zone, known as ULEZ, gather outside Downing Street to oppose the move, with many saying they couldn’t afford to replace non-compliant cars and vans that they use on a daily basis during a cost-of-living crisis. The city's mayor Sadiq Khan is pressing ahead with the politically charged extension of the toll across Greater London, arguing it will help clean up the British capital's air. However, he has faced a fierce backlash from many living in and around the newly encompassed areas since unveiling the plans last year, with critics arguing the scheme is more concerned with raising revenue. IMAGES AND SOUNDBITES