Council mergers: How to choose the right technology partner for local government reorganisation

Council mergers are reshaping the landscape of English local government. As two-tier systems give way to new unitary authorities, technology decisions made during the transition will define service delivery for a generation. Yet for many councils, the question is not simply which systems to adopt, but who to trust as a technology partner through one of the most complex transformations the sector has faced. 

This guide sets out what to look for, the priorities to sequence, and the mistakes to avoid when selecting a technology partner for council mergers and local government reorganisation (LGR). 

What does the English devolution white paper mean for council technology? 

The English devolution white paper, published in December 2024, set in motion the most significant restructuring of English local government in a generation. The ambition is clear: universal coverage of strategic authorities by the end of this parliament, with two-tier areas transitioning to unitary models. 

Since then, local government reorganisation has moved from policy to delivery. Twenty-one areas were invited to develop proposals, more than 60 plans were submitted, and government decisions have now been announced for most areas. With Surrey's new authorities going live in April 2027 and many others following in April 2028, technology leaders are working against a fixed deadline to consolidate systems, migrate data and establish secure digital foundations for the new councils 

The financial stakes are equally pressing. Analysis for the County Councils Network has indicated that replacing two-tier systems with unitaries could cost in the region of £850m over five years, with no net savings delivered. When technology is an afterthought, costs climb and disruption to residents deepens. Planned early and partnered well, it becomes the lever that protects services and unlocks efficiency. 

What qualities should councils look for in a technology partner during a merger? 

Not every supplier is a partner. The following five qualities distinguish a partner equipped to carry a council through LGR. 

Deep public sector experience 

Generic enterprise software rarely fits the realities of local government. The right partner has supplied technology to UK local authorities long enough to understand the regulatory environment, the funding cycles, the democratic accountability and the service pressures that shape every decision. They speak the language of LGR programme leads, not just IT procurement. 

Lifecycle support, from early planning to post-vesting day 

Technology partnership is not a moment; it is a continuum. The strongest partners engage early, help councils shape their target architecture, and stay present through data migration, staff training and post-go-live stabilisation. Support that begins on signature day and ends on go-live day leaves councils vulnerable precisely when they need help most. 

Innovation and AI readiness 

Reorganisation is a rare opportunity to modernise, not just consolidate. The right partner brings genuine innovation – cloud-first architecture, workflow automation and agentic AI capabilities embedded in public sector software – so the new authority emerges not merely merged but genuinely transformed. 

Human-centred delivery 

Technology fails without people. The right partner invests in the human side – training programmes, change management support and adoption strategies that help anxious staff move confidently to new systems. Cultural resistance is one of the biggest risks in any merger, and a partner that takes it seriously is worth more than one that does not. 

What technology priorities should merging councils consolidate first? 

When councils merge, everything seems urgent. The following checklist sequences the technology priorities that matter most, so leaders can focus effort where it counts. 

Priority	Why it matters	What to look for in a partner
Cloud strategy and data consolidation	New unitaries need a single, scalable platform – not a patchwork of legacy on-premise systems.	Cloud-first infrastructure aligned to UK government standards.
ERP and financial systems rationalisation	Merged authorities must produce one set of accounts from one general ledger.	ERP Software and Financials purpose-built for local authorities.
Cyber security across merged IT estates	Merging directories, domains and access controls widens the attack surface.	Secure, compliant infrastructure with proven public sector security experience.
Data integration and migration	Resident records, assets and finances must move cleanly – with UPRNs and USRNs preserved per GeoPlace guidance.	Track record of complex multi-authority data migration.
Unified service desk and support model	Staff need one number to call, not three inherited helpdesks.	UK-based 24/7 service desk capability via managed IT Services.
AI and automation readiness	The new authority should emerge ready to automate routine work.	Agentic AI capabilities embedded in public sector software.
HR and workforce management	Harmonising terms, roles and rotas across predecessor councils.	Integrated People Management for councils in structural change.

What common mistakes do councils make when choosing a technology partner? 

Even capable teams stumble during LGR. The following mistakes are the most common – and the most costly. 

• Lifting and shifting legacy systems rather than modernising. Replicating yesterday's systems in a new authority stores up tomorrow's problems. Merger is the moment to rationalise, not just relocate. 

• Choosing on cost alone. The cheapest bid on signature day rarely stays cheapest. Without assessing long-term support capability, councils pay later in remediation and downtime. 

• Engaging technology partners too late. When partners are brought in after governance structures are set and contracts are inherited, their ability to shape a coherent architecture is already compromised. 

• Underestimating data migration complexity. Reconciling resident records, financial histories and asset registers across councils is genuinely hard – and cyber risk rises during the transition. 

• Ignoring the human side. Staff anxiety and cultural resistance derail more technology programmes than technical failure does. Training and change management are not optional extras. 

How can councils future-proof through the right partnership? 

The right technology partner does more than see a council through vesting day – they help build an authority fit for the decade ahead. With the GDS Local unit launched in November 2025 to support councils with digital transformation, and GOV.UK app integration reshaping how residents access local services, the expectations on new unitaries are rising fast. 

Councils that build strong partnerships now will lead service delivery standards, not chase them. A strategic partner helps the new authority design for interoperability from the outset, embed AI and automation where it adds real value, and remain adaptable as policy and resident expectations evolve. Future-proofing is not about predicting the future – it is about choosing a partner flexible enough to meet it with you, supported by an intelligent system of work like OneAdvanced IQ. 

How does OneAdvanced support councils through mergers and reorganisation? 

OneAdvanced is a technology partner with a proven track record supplying software and services to UK local government and the wider public sector. For councils navigating LGR, that means working with an organisation that already understands the sector's pressures, regulatory environment and service realities. 

Cloud-first, secure and compliant infrastructure 

OneAdvanced's infrastructure is cloud-first, secure and aligned to UK government standards – giving merging authorities a stable, scalable foundation rather than a fragile inheritance of on-premises legacy systems. 

Agentic AI for the public sector 

OneAdvanced brings agentic AI capabilities embedded in public sector software, so new unitaries can automate routine work and free staff for higher-value service delivery from day one. 

ERP, financials and people management 

OneAdvanced offers ERP Software and Financials purpose-built for local authorities, alongside integrated People Management for councils undergoing structural change – giving the new authority one source of truth for money and people. 

IT managed services and data integration 

OneAdvanced IT Services provides UK-based 24/7 service desk support for merging authorities, together with data integration and migration support for complex multi-authority environments. Councils do not face vesting day alone. 

Lifecycle support and training 

OneAdvanced supports councils across the full lifecycle – from discovery through to post-vesting day – with training programmes that help staff adopt new systems confidently. It starts with support, and it continues long after go-live. 

For the full picture of how to approach technology through reorganisation, download the Council mergers and devolution whitepaper – Embracing Change. 

Conclusion 

Council mergers are a once-in-a-generation opportunity to build better services – but only if technology is treated as a strategic priority, not a procurement afterthought. The right technology partner brings deep public sector experience, transparency, lifecycle support, AI readiness and a human-centred approach to delivery. Choose early, choose strategically, and choose a partner that will still be there after vesting day. 

Frequently asked questions (FAQ) 

How do I choose the right technology partner for a council merger? 

Look for deep public sector experience, transparency about capabilities, lifecycle support from planning to post-vesting day, AI readiness, and a human-centred approach to training and change management. 

Which technology solutions do merging councils need to consolidate first? 

Councils should prioritise cloud strategy and data consolidation, ERP and financial systems, cyber security across merged estates, and data integration – with UPRNs and USRNs preserved per GeoPlace guidance. 

What questions should councils ask technology vendors before signing an LGR contract? 

Ask about their public sector track record, their approach to multi-authority data migration, their cyber security posture during transition, the support model after go-live, and how they handle staff training and change management. 

Does OneAdvanced provide AI tools for local government? 

Yes – OneAdvanced offers agentic AI capabilities embedded in public sector software, enabling new unitaries to automate routine work and improve service delivery from day one. 

How long does it typically take to integrate technology systems after a council merger? 

Timelines vary with the scale of the merger, but early engagement, clear data strategies and a partner experienced in multi-authority migration significantly reduce the time and risk involved.