Candidates in London's mayoral election have promised voters sweeping changes to emissions legislation, HGV safety and speed limits in-the capital if elected. Labour candidate Sadiq Kahn has pledged to bring forward the introduction of London's Ultra Low Emission Zone - a Euro-6-only zone using the same boundaries as the congestion charge set for 2020 - if he takes over from Boris Johnson. However, Green party candidate Sian Berry said she would extend its reach to make it London-wide.
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