Planning watchdog blocks London Mayor's ULEZ scrappage expansion beyond city limits

The Planning Inspectorate has ruled that London Mayor Sadiq Khan cannot extend the Ultra Low Emission Zone vehicle scrappage scheme beyond Greater London without central government approval, delivering a verdict on 3 July that reinforces the limits of devolved city powers over national transport policy.

The decision came after Khan sought to expand scrappage support to drivers in surrounding counties affected by the ULEZ boundary, including parts of home counties used by commuters travelling into the capital. The Mayor's proposal aimed to help drivers living just outside London's borders replace non-compliant vehicles that would face daily charges when entering the expanded emission zone.

Legal boundaries define city authority

The Planning Inspectorate found that extending the scrappage scheme beyond Greater London would fall outside the legal scope of the Greater London Authority's powers. Such an expansion would require either primary legislation from Parliament or a specific ministerial decision to proceed, the watchdog concluded.

The ruling establishes clear constitutional boundaries around what devolved city authorities can implement independently, particularly when their policies affect residents and businesses beyond their administrative borders. Khan's attempt to address the cross-boundary impacts of ULEZ expansion highlighted the complexity of environmental policies that operate across local authority boundaries.

The decision specifically referenced the Greater London Authority Act 1999, which defines the Mayor's powers as extending only to Greater London's 32 boroughs and the City of London. Any financial support scheme operating beyond these boundaries would constitute an ultra vires act, the Planning Inspectorate determined.

Criticism from councils and campaigners

Local authorities and clean air campaigners have criticised the decision, arguing that thousands of drivers living just outside London's borders are being left without support to replace vehicles that no longer meet emission standards. The criticism centres on what campaigners describe as a policy gap that leaves affected residents facing financial penalties without access to mitigation measures.

Surrey County Council and Hertfordshire County Council had both expressed support for Khan's proposed extension, arguing that their residents face the same financial burden as Londoners when travelling into the capital for work or essential services. The councils estimated that approximately 15,000 drivers in their areas would have benefited from the extended scrappage scheme.

Environmental campaign group Clean Air London described the ruling as creating a "postcode lottery" that penalises drivers based on administrative boundaries rather than their actual exposure to ULEZ charges. The group argued that the decision undermines the environmental objectives of the emission zone by failing to provide equitable support for compliance.

The controversy reflects broader tensions around environmental policies that create different treatment for residents based on administrative boundaries rather than their actual exposure to policy impacts. Drivers in areas immediately adjacent to London face the same daily charges as those within the capital but cannot access the same support mechanisms.

Government welcomes constitutional clarity

The UK government has welcomed the Planning Inspectorate's decision as reinforcing appropriate limits on devolved city powers over wider national transport and environmental policy. The ruling aligns with the government's position that significant policy extensions affecting multiple local authority areas require central coordination and approval.

Transport Secretary Mark Harper's department issued a statement supporting the decision, emphasising that cross-boundary transport policies must be developed through proper constitutional channels. The government argued that allowing mayors to extend policies beyond their jurisdictions without approval could create a patchwork of conflicting regulations across England.

This constitutional clarification comes amid ongoing debates about the extent to which city mayors and devolved authorities can implement policies with cross-boundary effects. The decision establishes precedent for how environmental and transport policies must navigate the boundaries between local and national authority, with potential implications for other metro mayors considering similar schemes.

Scottish implications for local environmental policy

The ruling carries particular significance for Scottish local authorities and the Scottish government as they develop their own environmental and transport policies. Scotland's local authorities have been exploring various clean air initiatives and transport restrictions, with some considering schemes that could affect cross-boundary travel patterns.

Glasgow City Council's ongoing development of its Low Emission Zone and Edinburgh's consideration of expanded traffic restrictions could face similar constitutional constraints if they seek to extend support or enforcement beyond their boundaries. The Planning Inspectorate's emphasis on the need for central government approval when policies extend beyond administrative boundaries may influence how Scottish authorities approach regional environmental coordination.

The Scottish government's transport strategy includes provisions for coordinated regional approaches to emission zones, but the London ruling suggests that formal legislative backing may be required for any schemes that cross local authority boundaries. This could affect plans for integrated transport policies across Scotland's central belt, where commuting patterns regularly cross council boundaries.

According to the BBC report, the decision reinforces constitutional principles that could apply to similar policy debates across the UK's devolved nations. The ruling may prompt Scottish authorities to seek clearer guidance on their own powers to implement cross-boundary environmental measures, particularly as cities like Glasgow and Edinburgh consider their own emission zone policies.

For Scottish policymakers, the London ruling demonstrates the importance of securing appropriate legal authority before implementing environmental policies that affect residents or businesses beyond their immediate jurisdiction. The precedent suggests that ambitious environmental policies requiring regional coordination will need either specific legislative backing or formal agreements between multiple authorities to proceed legally.