I like the work that Gov UK do in terms of accessibility, changes they make, and how they explain it. Not just from a compliance point of view, but a lot of thought goes into their design too. The first time I had to file my taxes (HMRC site), I was terrified, but their site guided me through the process, with clear divisions, sections, guidance along the way. In all of this their design decisions really shines, and it makes a lot of sense; dealing with legalese and paperwork is daunting, the last thing a user should be doing is having to 'navigate' your website.
Have a look at the Home Office part of gov.uk and I think you'll soon change your mind. Pure abomination. At one point, before I kicked up a fuss, they had 2 distinct links - Biometric Residence Permit (BRP) and Biometric Residence Card (BRC) - with apparently different destinations but which, in fact, pointed to the same form. Worse, staff responding to BRP/BRC enquiries were convinced the links pointed to distinct forms and were even including the fictional link distinction in rationales for rejecting applications.
Then there was the form with fields which rejected input with trailing whitespace with no explanation, ie. no trim function. I could go on.
