EN 301 549 - Accessibility requirements for ICT products and services
In 2014 a European law was passed which stated that anything which is bought or built by a public sector body needs to meet the European Standards for accessibility known as EN 301 549. The deadline for this was 23 September 2020.
The documented EN 301 549 - Accessibility requirements for ICT products and services is the European Standards. They apply to any software or hardware bought or built by a public sector body in Europe. It also covers websites and mobile applications, but if you’re building or buying these in the UK, the Public Sector Bodies Accessibility Regulations 2018 would be the standard you would need to work to.
References to the EN standard were removed in the 2022 amendment to the Public Sector Bodies Accessibility Regulations, although the requirement of conformance with WCAG for public sector websites and mobile applications remains.