The Design Manual of Gov.uk, the UK Government services and information portal, has a section on user-centred design, whereas the service manual home page describes in more detail how designers can build a gov.uk service: from discovery, to alpha, beta, live and retirement.
“People come to GOV.UK with specific needs. Anything that gets between our users and meeting those needs should be stripped away. The design of GOV.UK reflects this, existing primarily as a way of delivering the right content and services to our users. Find out here how we approach this challenge.”