Urban development in the United Kingdom has undergone a fundamental shift over the past decade, moving from fragmented local planning toward a more integrated model of governance. Central to this transformation are the mayors of the UK's largest city-regions, whose roles have expanded through devolution deals that grant them new powers over transport, housing, skills, and economic development. Yet the success of these mayors depends not only on their own leadership but on their ability to forge effective partnerships with regional combined authorities and the national government. This article examines how UK mayors are collaborating across levels of government to drive sustainable, inclusive, and forward-looking urban development.

The Evolving Role of UK Mayors in Urban Development

The position of directly elected mayor in England is a relatively recent innovation, dating to the establishment of the Greater London Authority in 2000. Since then, devolution deals have created metro mayors in city-regions such as Greater Manchester, Liverpool City Region, West Midlands, West Yorkshire, South Yorkshire, Tees Valley, and the Cambridgeshire and Peterborough Combined Authority. These mayors are responsible for strategic decisions that shape their city-regions' economic and physical landscapes, including transport networks, housing delivery, land use planning, and adult education budgets.

Unlike the ceremonial lord mayors found in many British towns, these metro mayors hold real executive authority. They chair their combined authorities, propose spatial development strategies, and control multi-year investment funds. This structure allows them to act as a single point of accountability for urban development, while also serving as high-profile advocates for their regions in negotiations with Whitehall. The Devolution Deals that created these roles explicitly require mayors to work collaboratively with both local councils and national departments, embedding partnership into the DNA of city-region governance.

Devolution as a Framework for Collaboration

Devolution in the UK has not been a uniform process but rather a series of bespoke agreements between central government and individual city-regions. Each deal transfers specific powers and funding streams, often conditioned on the existence of a directly elected mayor. The official list of devolution deals maintained by the Ministry of Housing, Communities and Local Government shows the gradual expansion of mayoral responsibilities. For instance, Greater Manchester's second devolution deal in 2024 transferred additional control over bus franchising and cycling infrastructure, while the West Midlands deal of 2023 gave the mayor greater influence over the region's housing investment.

These arrangements have forced mayors to develop new collaborative muscle. They must align the priorities of their office with the statutory duties of district councils within the combined authority area, while also meeting the expectations of central government on national targets such as net-zero carbon emissions or meeting housing supply numbers. This balancing act requires constant negotiation, joint planning, and transparent communication—skills that successful modern mayors have had to cultivate quickly.

Regional Collaboration: Breaking Down Silos

One of the most significant contributions of UK mayors has been their ability to coordinate policy across local authority boundaries. Prior to devolution, urban development was often hampered by competition between neighbouring councils. A housing development might be rejected in one borough only to be approved in an adjacent one with weaker infrastructure, creating disjointed growth. Mayors operating at the combined authority level can impose a regional perspective, ensuring that housing, transport, and employment strategies are coherent.

The primary vehicle for this regional collaboration is the Combined Authority, a legal entity that brings together multiple councils to exercise certain functions jointly. The mayor chairs the authority and its cabinet, but decisions are made collectively with the leaders of the constituent councils. This structure forces compromise and consensus-building. For example, the Greater Manchester Combined Authority (GMCA) includes the leaders of ten metropolitan boroughs. Together they have produced a Greater Manchester Spatial Framework that allocates land for housing and employment across the entire city-region, rather than each borough acting alone.

Integrating Transport and Land-Use Planning

Transport is often the first area where regional collaboration delivers visible results. Mayors like Andy Burnham in Greater Manchester and Richard Parker in the West Midlands have used their powers to integrate local rail, bus, and tram services into unified networks. The Bee Network in Greater Manchester, which took full control of bus services under a franchising model in 2024, is a landmark example of how a mayor can use devolved powers to create seamless public transport. This required close cooperation with Transport for Greater Manchester, the region's ten councils, and the national Department for Transport.

Similarly, housing strategies are being coordinated at the regional level. Mayors are using their control over the Brownfield Land Fund—a pot of money provided by central government to remediate derelict sites—to prioritise development in locations that match the spatial strategy. In the West Midlands, Mayor Richard Parker has committed to building on brownfield land before opening up greenfield sites, a policy that aligns with both national environmental goals and local planning preferences. This kind of targeted investment is only possible because the mayor can work across council boundaries to direct funding where it will have the greatest regional impact.

Environmental Sustainability as a Collaborative Goal

Many mayors have placed environmental sustainability at the heart of their urban development strategies. The Liverpool City Region’s Climate Partnership, chaired by Mayor Steve Rotheram, brings together local authorities, businesses, and research institutions to deliver a net-zero target by 2040. This includes region-wide projects for retrofitting homes, expanding cycle routes, and creating green corridors. The partnership model allows the mayor to pool resources from multiple councils, avoiding duplication and scaling up effective initiatives.

Another example is the West Yorkshire Combined Authority, where Mayor Tracy Brabin has overseen the creation of a regional tree-planting programme and a zero-emission bus fleet. These initiatives rely on funding from the national government's Net Zero Strategy and are delivered through collaboration with district councils that own the land and infrastructure. The mayor serves as the catalyst, aligning the incentives of all parties toward a common environmental target.

Engagement with the National Government

While regional collaboration is essential, mayors must also maintain strong relationships with central government to secure the funding and policy changes that make urban development possible. The national government controls major funding streams, such as the Levelling Up Fund, the UK Shared Prosperity Fund, and the Housing Infrastructure Fund. Mayors must advocate effectively for their regions to receive a fair share of these resources, often competing against each other in a process that the government describes as "competitive devolution."

The Levelling Up White Paper, published in 2022, set out a framework for how central government expects to work with mayors and combined authorities. It introduced the concept of "trailblazer devolution deals," which offer deeper powers and longer funding settlements in exchange for stronger accountability. Greater Manchester and the West Midlands became the first trailblazer deals in 2023, giving their mayors more control over spending on skills and transport over five-year cycles. This model reduces the need for annual bidding rounds and allows mayors to plan long-term infrastructure investments with greater certainty.

Advocacy and Policy Influence

Mayors also act as powerful lobbyists for their regions. The Mayoral Council, a forum that brings together the Prime Minister and elected mayors from across England, provides a platform for discussing national policy changes that affect urban areas. Through this body, mayors have pushed for reforms to the planning system, greater flexibility in housing grants, and more ambitious climate targets. Their combined voice carries weight, especially when they speak with unanimity on issues such as transport investment or social housing.

Individual mayors also engage directly with government departments. For example, the Mayor of London's team regularly meets with the Department for Transport to negotiate funding for Transport for London, while the Mayor of Tees Valley has worked closely with the Department for Business and Trade to secure freeport status for the region. These relationships are built on trust and a proven ability to deliver results, which makes the national government more willing to delegate further powers in future deals.

Securing Funding for Large-Scale Projects

The most visible fruit of national-regional collaboration is the funding of major infrastructure projects. The Transpennine Route Upgrade, a multi-billion pound railway modernisation between Manchester, Leeds, and York, has been advanced through the combined efforts of mayors from Greater Manchester, West Yorkshire, and South Yorkshire, alongside the Department for Transport. Similarly, the West Midlands Metro extension to Brierley Hill was made possible by a funding package that included contributions from the local combined authority, the West Midlands Mayor’s office, and central government’s City Region Sustainable Transport Settlement.

Housing also benefits from this tri-level partnership. The Housing Accelerator Fund, announced in 2023, gives mayors in combined authorities the power to allocate up to £500 million to accelerate housing delivery on public sector land. The West Yorkshire Combined Authority used this fund to fast-track 1,200 new homes in Leeds and Bradford, working with Homes England and the Department for Levelling Up, Housing and Communities. Such examples show that when mayors collaborate effectively with national bodies, they can unlock resources that would be impossible to access at the local level alone.

Case Studies of Successful Collaboration

Examining specific city-regions reveals how collaborative governance translates into tangible urban development outcomes.

Greater Manchester

Under Mayor Andy Burnham, Greater Manchester has become a model for integrated urban development. The Greater Manchester Devolution Agreement, first signed in 2014 and significantly expanded in 2023, gave the mayor control over an integrated health and social care budget, transport, housing, and adult skills. The result has been a coordinated approach to brownfield remediation, with the mayor’s Homes and Neighbourhoods Fund providing £300 million to build 10,000 affordable homes on previously developed land. The close working relationship between Burnham, the ten borough leaders, and central government has allowed the region to pilot innovative policies, such as a bus franchising system that has increased ridership by 15%.

West Midlands

Richard Parker, elected mayor in 2024, has built on the legacy of his predecessor Andy Street by deepening collaboration with the West Midlands Combined Authority and the national Homes England. The region’s Brownfield Land and Property Development Programme has reclaimed more than 200 hectares of derelict land for new housing and commercial space. Parker’s focus on “growth corridors”—linking housing developments to new railway stations and bus routes—has required joint planning with Network Rail, the Department for Transport, and district councils. The success of the Commonwealth Games legacy development in Perry Barr, which delivered 1,400 homes and a new station, demonstrated the power of aligned priorities across all three tiers of government.

Liverpool City Region

Mayor Steve Rotheram’s Liverpool City Region Combined Authority has been notable for its emphasis on digital and green infrastructure. The development of the Liverpool City Region Metro Mayor’s Productivity Fund uses money from the national government’s Local Growth Fund to support innovation hubs and clean energy projects. Collaboration with the national UK Research and Innovation (UKRI) body has brought a £50 million investment in a hydrogen transport hub, which will create jobs and reduce emissions. Local councils have worked with the mayor to expedite planning permissions for these projects, while the Department for Business, Energy and Industrial Strategy has provided regulatory support. This multi-level partnership has enabled the region to attract high-value investment despite having fewer resources than larger city-regions.

Challenges and Opportunities

Despite the successes, collaboration between mayors, regional bodies, and national government is not without difficulties. One persistent challenge is political alignment. Mayors and national governments often belong to different political parties, which can create friction over funding priorities or policy directions. For example, the current national government’s emphasis on fiscal discipline has sometimes conflicted with metro mayors’ demands for higher public investment. Finding common ground requires tact and a willingness to compromise on both sides.

Another challenge is funding instability. Many devolution deals provide multi-year funding, but the level of resources still depends on central government priorities that can shift with each spending review. Mayors must continually prove the value of their regions to secure continued support. This can lead to a focus on short-term, visible projects at the expense of longer-term strategic planning. The recent introduction of single funding settlements for trailblazer combined authorities aims to address this, but it remains to be seen whether the model will be extended to all city-regions.

Capacity and skills also pose obstacles. Smaller combined authorities may lack the expert staff needed to bid for complex funding streams or to manage large-scale infrastructure projects. The national government has recognised this through the Devolution Capacity Fund, which provides grants to help regions build their administrative capabilities. Mayors have also formed peer networks to share best practices, such as the cross-regional comparisons conducted by the think tank Centre for Cities.

The Future of Collaborative Urban Development

Looking ahead, several trends are likely to shape how UK mayors continue to collaborate with regional and national governments. Digital integration will become increasingly important, with mayors using data from smart city sensors, transport cards, and land registries to make evidence-based decisions. The Local Digital programme run by the Ministry of Housing, Communities and Local Government is already encouraging combined authorities to adopt common data standards, which will facilitate smoother coordination across councils and with central government.

Community engagement is another area where mayors are expected to deepen collaboration. Many combined authorities are experimenting with citizens’ assemblies and participatory budgeting to give residents a direct voice in urban development decisions. The mayor of Greater Manchester has held regular “town hall” meetings where local people can challenge his transport and housing plans. This grassroots input helps mayors align their projects with genuine local needs, which in turn builds political support for continued devolution.

Finally, the climate and nature crisis will force even closer cooperation. National net-zero targets set by the UK government require urban areas to decarbonise rapidly, but many of the actions—such as retrofitting buildings, installing heat pumps, and rewilding public spaces—must be delivered by local authorities working with mayors. The Green Finance Institute has proposed that mayors and combined authorities issue green bonds to finance these projects, a model that could be scaled nationally. This would require new regulatory frameworks from the Treasury, illustrating how collaboration must extend to financial and legal innovation as well as on-the-ground projects.

In conclusion, the collaboration between UK mayors, regional combined authorities, and the national government represents a powerful force for urban development. By breaking down silos, aligning funding, and fostering political consensus, these partnerships have delivered tangible improvements in transport, housing, and sustainability. The challenges of political friction, funding instability, and capacity gaps remain, but the trajectory is toward deeper, more mature collaboration. As devolution continues to evolve, the mayors of the UK’s city-regions will remain central figures in building the resilient, inclusive, and prosperous cities of the future.