Secure, Cost-Controlled Cloud Migration for UK Public Sector Legacies

UK public sector organisations still run estates that underpin essential services, often with outdated platforms, complex dependencies and strict regulatory constraints. Cloud can improve agility and resilience, but only if we design security and financial control in from day one.

How we approach it

For us, successful migration is a governed programme: assess honestly, design a secure target architecture, automate delivery, and keep optimising cost. We do this as a G-Cloud 14 Cloud Support supplier with Cyber Essentials certification.

Legacy challenges that actually block migration

• Complex dependencies on unsupported middleware and bespoke integrations

• Incomplete documentation that increases cutover risk

• Security vulnerabilities in unsupported software stacks

• Procurement and operating models that assume on-premise cost shapes

A control-first sequence we trust

• Discover: inventory, dependency mapping, data classification, risk register

• Target architecture: landing zones, identity, networking, logging, backup

• Automate: IaC, CI/CD, environment parity, evidence packs for assurance

• Migrate in increments: strangler patterns, dual-run where needed, rollback plans

• Operate: FinOps, patching, observability SLOs, continuous hardening

Cost without false economy

The cheapest migration is often the most expensive to run. We push for right-sizing, reserved capacity where it is justified, lifecycle policies, and clear workload ownership, so resilience does not arrive with a surprise bill.

If you are preparing a G-Cloud or framework engagement, ask for a plan that treats security, delivery automation and cost governance as the same programme, not three separate workstreams.