LLEZ meaning in General ?

The London Low Emission Zone (LEZ) is a traffic pollution charge scheme with the aim of reducing the exhaust gas emissions of diesel-powered vehicles in London. The scheme applies London-wide to commercial vehicles, and should not be confused with the Ultra Low Emission Zone (ULEZ), introduced in April 2019, which applies to all vehicles in Central London. Vehicles that do not conform to various emission standards are charged; the others may enter the controlled zone free of charge. The low emission zone started operating on 4 February 2008 with phased introduction of an increasingly stricter regime until 3 January 2012. The scheme is administered by the Transport for London executive agency within the Greater London Authority.

The current standard for large commercial vehicles (over 3.5 tonnes) is Euro VI, increased from Euro IV on 1 March 2021. Vehicles need to meet these standards or face a penalty of £100 per day. The new rules were due to come into force in October 2020 but were postponed due to the 2020 coronavirus pandemic.