Summary

• Parliament identifies UK dependencies across cloud computing, AI, advanced semiconductor manufacturing, and payment networks.
• The briefing treats sovereignty as the ability to manage critical dependencies rather than technological self-sufficiency.
• Procurement, open source, skills, and better supply-chain mapping are among the options raised for strengthening resilience.

Britain’s reliance on foreign technology is spread across so many layers of the economy that digital sovereignty cannot sensibly be reduced to where cloud servers are located, with Parliament now placing infrastructure, software, artificial intelligence, data, payments, and technical skills inside the same policy problem.

The Parliamentary Office of Science and Technology has published a briefing examining how much agency the UK retains over the digital systems on which government, companies, and citizens depend. It divides those systems into infrastructure such as data centres, code including AI, and data including health records.

The briefing identifies domestic strengths in areas including semiconductor design, research, compound-semiconductor manufacturing, and valuable datasets held by organisations such as the NHS and BBC. It also points to dependencies around cloud providers, AI, advanced chip manufacturing, and payment systems without a single digital-sovereignty strategy tying those exposures together.

The analysis avoids the simplistic conclusion that sovereignty requires replacing every overseas supplier with a British one. Stakeholders consulted by POST instead describe a model based on understanding which dependencies are critical, reducing excessive concentration, and retaining enough domestic capability to buy, assess, operate, and repair important systems.

Concentration is different from foreign ownership

Modern technology supply chains are international by design. Britain is unlikely to manufacture every advanced processor, operate every important cloud service, build every enterprise-software product, and process every payment domestically without substantially increasing costs and losing access to technologies produced elsewhere.

Risk becomes more acute where an essential function depends on a small number of providers and switching is difficult. Cloud computing illustrates the point because moving a large application can require changes to architecture, data, skills, contracts, security controls, and surrounding software rather than simply transferring information to another server.

Commercial demand for sovereign cloud and cyber-recovery arrangements is already reflecting some of those concerns, while the Parliamentary briefing places them inside a broader national question about whether critical functions can continue operating when a supplier, jurisdiction, or geopolitical relationship becomes unavailable.

Payments show the same issue beyond conventional IT. POST notes that almost all UK card payments are administered through US companies Visa and Mastercard, while the government is developing plans around national payment infrastructure. The concern is therefore not that overseas providers are inherently unreliable, but that strategically important functions can accumulate around systems over which Britain has limited unilateral control.

Procurement becomes an industrial lever

Public purchasing is one route through which government could alter that balance. POST cites about £14 billion of annual public spending on digital programmes and technology, while Parliamentary committees and the National Audit Office have argued that procurement could do more to support domestic capability.

Such a policy has an obvious limit. Buying British technology can reduce selected dependencies and strengthen suppliers, but requiring domestic products regardless of quality, price, interoperability, or security risks creating costly protectionism rather than meaningful resilience.

The NHS illustrates the tension. POST cites Palantir’s £330 million contract for an NHS data platform and calls made by MPs for the government to use a 2027 break clause and develop a UK alternative. Decisions of that scale combine procurement with questions around switching costs, data control, skills, and whether a credible substitute exists when an existing contract ends.

Open-source software presents another possible tool because access to underlying code can reduce some forms of vendor lock-in. It does not eliminate dependence automatically, however, since organisations still need the technical ability to maintain systems, respond to vulnerabilities, operate infrastructure, and understand the components on which the software itself depends.

Sovereignty starts with knowing what can fail

The more immediate weakness identified by POST is informational. Government cannot manage strategic digital dependencies effectively without knowing which systems are critical, how their supply chains work, which organisations they depend on, and what happens if an important component fails.

That resembles resilience planning in energy, finance, or transport. A country does not need to own every part of those systems to care about concentration, alternatives, recovery time, and interruption, while digital technology is now embedded deeply enough in each sector to amplify failures elsewhere.

Skills form part of sovereignty for the same reason. An organisation that purchases critical technology but lacks the expertise to evaluate, configure, maintain, or replace it can remain highly dependent even when the supplier itself is domestic.

The UK consequently faces a balance rather than a binary choice between global integration and technological autarky. Access to international technology has supported much of the digital economy, while concentration in cloud, chips, AI, and payments creates dependencies that become more visible during commercial or geopolitical disruption.

Parliament’s briefing does not settle how sovereign Britain should become, but it pushes the debate towards a more practical measure: which digital systems the country cannot afford to lose control of, how dependent those systems are on a small number of suppliers, and whether credible alternatives exist if that dependence is tested.