You can log into various services in order to do things like manage your tax account. Of course they need cookies (or some other form of session management).
And even not for that, analytics is a useful tool to figure out how people use the website.
And even not for that, analytics is a useful tool to figure out how people use the website.
In the UK, cookies used for only that purpose don't require consent. In their cookie policy, you can see they don't ask for permission to set such cookies - they rely on a different legal basis: https://www.blog.gov.uk/cookies/