UK BankingSystem Architecture
A detailed architectural whitepaper by Bharat Kumar Dixit examining the technical foundations of the UK's world-leading banking infrastructure — Open Banking, PSD2, real-time payment rails, and the path to cloud-native core banking.
Six Areas of Analysis
Open Banking API Layer
Technical breakdown of the UK's Open Banking Standard — API specifications, consent architecture, TPP (Third Party Provider) integration patterns, and the FCA regulatory sandbox.
PSD2 Compliance Architecture
Implementation blueprint for PSD2 — Strong Customer Authentication (SCA), TLS certificate management, dynamic linking, and the technical requirements for Account Information and Payment Initiation Services.
Real-Time Payment Rails
Deep-dive into Faster Payments Service (FPS), CHAPS for high-value same-day settlement, and the New Payments Architecture (NPA) — the ISO 20022-based infrastructure replacing legacy rails.
Cloud-Native Core Banking
Architecture patterns for migrating legacy core banking systems to cloud-native infrastructure — strangler fig patterns, event sourcing, CQRS, and the technical challenges of zero-downtime migration.
Security & Resilience
UK banking's operational resilience requirements, Critical Third Party (CTP) framework, cyber security obligations under the Bank of England's CBEST regime, and zero-trust network architecture.
Mobile Banking Architecture
Mobile-first banking architecture patterns — biometric authentication, push payment notifications, offline resilience, and the technical stack behind leading UK challenger banks.
UK Banking's Digital Evolution
Open Banking Standard launched
CMA9 banks mandated to implement Open Banking APIs
PSD2 Strong Customer Authentication
SCA requirements enforced across UK payment services
New Payments Architecture announced
Pay.UK publishes NPA blueprint — ISO 20022 migration
CBDC Research intensifies
Bank of England advances digital pound consultation
Smart Data regime expansion
Open Finance extending to mortgages, pensions, and investments
Bharat Kumar Dixit
CTO at Vigorus.ai · Senior Mobile Application Architect at IBM · International Tech Leader
Download UK Banking Whitepaper