AWS, Microsoft and Google Are Now Part of Britain’s Financial Risk Map

Amazon Web Services, Microsoft, Google Cloud and Oracle last week became the first companies designated as Critical Third Parties to the UK financial sector. (UK Government, 2026). The Bank of England, the Prudential Regulation Authority, and the Financial Conduct Authority can now supervise the resilience of services whose disruption could threaten financial stability or confidence.

"Critical third parties provide essential services which support innovation and growth. At the same time, when the same providers serve thousands of firms, a single failure can reverberate across the financial system," Nikhil Rathi, Chief Executive at the FCA, said in a Bank of England release. "Operationalising this regime strengthens our ability to tackle those risks and improve overall resilience, ensuring the UK remains a safe and attractive place to do business.”

The designated companies will face requirements covering resilience testing, incident reporting, risk management and regular self-assessment. Regulators will also be able to examine whether recovery arrangements remain credible during severe disruption and whether weaknesses in one provider could cascade across multiple financial firms (Bank of England, 2026).

Each designated provider must:

• Submit an initial self-assessment within three months of designation;
• Update that assessment annually;
• Test severe but plausible disruption scenarios;
• Maintain an incident-management playbook;
• Conduct its first joint exercise with financial-sector customers within 12 months;
• Repeat joint exercises at least once every two years; and
• Share timely information with regulators and affected firms during serious incidents, rather than leaving each bank to determine the scale and cause of the disruption independently (Bank of England, 2024).

“The regulators will work together with the CTPs to address system‑level risks and reduce the risk of disruption to the services they provide spreading across the UK financial system,” according to the release. “This will strengthen system-wide resilience and improve coordination and information sharing across the UK financial sector. CTPs must identify and manage risks to their critical services effectively, and maintain open, timely communication with regulators and the firms that rely on them, particularly during major incidents.”

Cloud platforms support payment processing, fraud detection, customer data management, trading infrastructure, and an expanding range of AI systems. Their scale allows banks to access computing power, security capabilities, and technical sophistication that would be costly to reproduce internally, yet that same scale also concentrates essential functions within a very small group of providers.

A technology failure at one bank remains largely contained within that institution, whereas a failure in infrastructure shared by many banks can disrupt multiple firms at once. The cloud creates a form of common exposure: several institutions may operate different applications while still relying on the same region, identity service, network layer, or software stack underneath them.

In practical terms, the regime establishes a direct communication channel between regulators and the companies that operate the infrastructure. During a large outage, authorities can obtain a cross-sector view of which services have failed, which institutions are affected and how recovery is progressing. Previously, several banks could report separate incidents caused by the same underlying cloud failure before regulators had enough information to identify the shared dependency.

Regulatory oversight does not certify AWS, Microsoft, Google Cloud, or Oracle as fail-safe, nor does it transfer accountability for resilience to the providers. Financial firms must still map their dependencies, test failover arrangements, maintain independent backups and decide how essential services would continue during a prolonged disruption. A multi-cloud strategy offers limited protection when the core workload, identity system, or recovery environment remains tied to a single provider (FCA, 2026).