Ok but let's not deify gov.uk. Yes it's very good compared to most government websites but it's not the peak of web design. They are so anally averse to any form of JavaScript or interactivity that often the web pages become quite tedious to use, e.g. when picking dates for payments, they don't have a "tomorrow" button even though that's what you want 99.999% of the time because that would need the dreaded JavaScript.