The Standard
GOV.UK consistently ranks in the top 3 globally for digital government services. It serves 60+ million UK residents with government information and services. It was not built on WordPress or Drupal.
The Architecture Decision
When the Government Digital Service (GDS) was established in 2011, they made a deliberate choice: build a custom modern platform rather than adopt a legacy CMS. The rationale was clear — government services are too important to depend on third-party plugin ecosystems and the security vulnerabilities they bring.
The result: a platform that loads fast on any connection, passes accessibility standards by default, and has a security posture that CMS-based government sites can't match.
Why Others Haven't Followed
Most governments default to WordPress or Drupal because procurement processes favor known vendors and established ecosystems. The UK invested in building capability internally — GDS hired designers and developers directly, rather than outsourcing to agencies that default to CMS platforms.
The lesson isn't 'build a custom CMS.' The lesson is: invest in the capability to make informed technology decisions rather than defaulting to what procurement catalogs offer.
The ICO Enforcement Connection
The UK's Information Commissioner's Office has been among the most active GDPR enforcers in Europe. Organizations running personal data on legacy CMS platforms face higher compliance risk — not because GDPR targets specific frameworks, but because legacy infrastructure makes demonstrating compliance harder.