London contractors warned of upcoming generator emissions rules

The mayor of London’s office published guidance this year introducing specific criteria for exemptions from NRMM low emission zone (LEZ) rules, which require all generators used within Greater London to meet stage V emissions standards.

The new guidance instructs site managers to provide evidence that they have requested a stage V generator from a supplier, details of the supplier’s stage V fleet, and orders demonstrating a move towards a stage V fleet.

It also requires data demonstrating loading issues and proof of consideration of load management technology, such as smart distribution boards or battery and flywheel storage.

Before introducing these rules, site managers could provide “reasonable justification” for using equipment that did not meet the emissions standards.

The requirements for air compressors are also set to become stricter. Currently, stage IIIB is required across the capital, except for the Central Activities Zone and Opportunity Areas, where Stage IV is required.

From 1 January 2030, all NRMM within Greater London will need to meet stage V as a minimum. The mayor of London aims for London to have zero emissions from NRMM by January 2040.