What's in this article?
For over a decade, the enterprise IT narrative was simple: move everything to the public cloud.
Yet as enterprise architectures have matured, many UK technology leaders have discovered that hyperscale cloud environments do not always deliver the outcomes they expected. The promises of seamless scalability and lower total cost of ownership often come with trade-offs that become more apparent over time.
Technical debt, integration complexity and governance challenges can all increase as cloud estates expand. Service outages, rising costs, data egress fees and regulatory pressures are also prompting organisations to reassess their approach.
Today, a cloud-to-cloud migration or a move away from public cloud is no longer viewed as a failure of cloud adoption. It is increasingly recognised as a strategic decision to align infrastructure with business goals, risk mitigation and workload requirements.
Why organisations move between cloud environments
There is rarely a single reason behind a cloud migration decision. More often, organisations are responding to a combination of operational, financial and regulatory challenges.
- Concerns around systemic outages and resilience
Even hyperscale providers experience downtime. While service availability remains high, relying heavily on a single platform can create a significant point of failure.
Many organisations look to reduce concentration risk by adopting a cloud resilience strategy. As workloads are distributed across different environments, businesses often develop hybrid or multi-cloud architectures that improve continuity and resilience.
Reducing dependency on a single provider is becoming a key infrastructure priority.
- Managing unpredictable costs and complex billing
Public cloud pricing can be difficult to forecast accurately. Costs associated with network traffic, storage growth, API calls and data egress frequently create unexpected expenditure.
For many mid-market and enterprise organisations, predictable infrastructure costs are becoming increasingly attractive. Greater certainty over monthly spending can support more effective budgeting and long-term planning.
- Keeping control over infrastructure
Public cloud platforms are designed around standardisation and shared resources. While this accelerates deployment, it can also limit opportunities for customisation and optimisation.
Organisations running specialised applications, latency-sensitive systems or AI workloads often require greater visibility and control over their infrastructure. In these cases, alternative deployment models can provide more flexibility.
- The need to address compliance, sovereignty and data location
Regulations such as GDPR and the Digital Operational Resilience Act (DORA) have increased scrutiny around data governance and operational resilience.
Business leaders need confidence in where data is stored, how it moves between systems and who can access it. As a result, many organisations are implementing multi-cloud and hybrid strategies that keep sensitive workloads within specific geographic boundaries.
The challenge is not deciding whether to migrate; but determining the most appropriate migration path.
Common cloud migration paths explained
Enterprise cloud migration planning generally follows one of four routes.
- Cloud-to-cloud migration
Cloud-to-cloud migration involves moving workloads between public cloud providers or distributing workloads across multiple hyperscale platforms.
This approach can help organisations improve resilience, meet compliance requirements, access specialist services and increase commercial flexibility during contract negotiations.
- Hybrid cloud migration
Hybrid cloud environments combine public cloud resources with private cloud, Infrastructure as a Service (IaaS) platforms or on-premises infrastructure.
The goal is to balance public cloud scalability with the security, governance and cost predictability of dedicated infrastructure.
Hybrid approaches can help organisations reduce single-provider risk while maintaining operational flexibility.
- Cloud repatriation
Cloud repatriation involves moving workloads from public cloud environments back into dedicated infrastructure or IaaS platforms.
Organisations typically pursue this route to gain greater control, improve compliance, strengthen security or address escalating cloud costs which are frequently a catalyst for these programmes.
- Colocation
At the opposite end of the spectrum, colocation involves moving workloads from public cloud environments into third-party data centres while retaining ownership of the underlying hardware.
This model enables organisations to maximise existing infrastructure investments while reducing the burden of managing physical facilities.
Research from Pulsant shows that 87% of UK businesses plan to move partially or fully away from public cloud environments over the next two years. Among those considering repatriation, 54% are evaluating private cloud solutions, while 36% are assessing colocation options.
These findings demonstrate that many organisations are reassessing where workloads should sit across the spectrum. For many, IaaS migration represents a practical middle ground that balances flexibility, control and cost efficiency.
Assessing readiness for cloud migration
Before moving workloads, organisations should establish a clear understanding of their current environment and operational requirements.
- Workload and dependency mapping
A migration cannot succeed without a detailed view of application dependencies, integrations and data flows.
Dependency mapping helps identify potential bottlenecks, latency issues and application relationships that could be disrupted during migration. It also ensures critical systems are accounted for before changes are made.
- Risk and downtime assessment
Every migration carries some degree of operational risk.
Organisations should define Maximum Tolerable Downtime (MTD), recovery objectives and contingency plans for each workload. These parameters help determine migration sequencing and identify the controls needed to minimise disruption.
Effective cloud outage risk management begins long before the migration itself.
- Infrastructure and performance requirements
Migration projects are an ideal opportunity to review infrastructure requirements.
Rather than simply recreating existing environments, organisations should analyse historical usage patterns and evaluate compute, storage, connectivity and latency needs. This often reveals opportunities to optimise resource allocation and reduce unnecessary expenditure.
Planning migrations without disruption
Once you’re ready to migrate, careful planning is essential to maintaining continuity throughout a programme.
- Phased migration approaches
Most successful migrations are executed in stages.
Development, testing and non-production environments are typically migrated first. Low-risk internal applications follow, while business-critical systems are reserved for later phases once confidence in the process has been established.
- Testing and validation
Rigorous testing should accompany every stage of migration.
Performance metrics should be benchmarked against existing environments, and all applications should be validated before production traffic is redirected. Continuous monitoring across both source and destination environments helps identify and resolve issues quickly.
- Backup and disaster recovery planning
Every migration plan should include a rollback strategy.
Independent backups of applications, configurations and data provide a safety net if unexpected problems arise. Engineering teams should have documented procedures that allow workloads to be restored rapidly if required.
Choosing the right infrastructure model
A successful migration is ultimately measured by how well the chosen infrastructure supports business objectives.
IaaS for control and predictability: Infrastructure-as-a-Service platforms provide greater control over operating systems, network architecture and configuration while eliminating the need to manage physical data centre facilities. They also offer predictable billing models that simplify forecasting and budgeting.
Hybrid environments for flexibility: Hybrid environments enable organisations to position workloads according to their specific requirements. Applications that benefit from elastic scaling can remain in public cloud environments, while sensitive or performance-critical workloads can operate within dedicated infrastructure.
Colocation for ownership and efficiency: Colocation is often well suited to organisations that have already invested heavily in specialised hardware. By retaining ownership of infrastructure while outsourcing facility management, businesses can maintain control without the costs associated with operating their own data centres.
Selecting the right environment depends on workload characteristics, performance expectations and cost objectives. The most successful cloud infrastructure strategies ensure that each workload runs where it delivers the greatest value.
How UK-hosted infrastructure supports control and resilience
For many UK organisations, balancing performance, risk and cost is leading to greater interest in UK-hosted infrastructure.
Local infrastructure can reduce dependency on international hyperscale providers while offering greater visibility, control and certainty around data location. This supports compliance objectives and strengthens data sovereignty strategies.
Regional UK data centres can also improve performance by reducing network latency and providing direct connectivity options across the country… and beyond.
Knowing exactly where data resides, how it is managed and which infrastructure supports critical workloads offers a level of assurance that many organisations now regard as essential.
Pulsant's UK infrastructure platform supports hybrid and multi-cloud strategies that help organisations improve resilience, maintain control and optimise costs, while making sure workloads are deployed in the environment best suited to their needs.
Take the next step
Whether you are planning a cloud-to-cloud migration, considering cloud repatriation or developing a hybrid cloud strategy, the right infrastructure model can improve resilience, control and cost predictability.
Speak to Pulsant about your cloud migration strategy and discover how UK-hosted infrastructure can support a more resilient multi-cloud future – email us or make an enquiry.
