Accessibility issues with the sign-in pages

[edwardhorsford]

Hi Publisher team 👋

There's a few accessibility issues with the sign in pages. Example, example 2.

I'm not sure how to report (posted a message on cross gov slack), so raising here.

Issues:

1. Missing Error: in page title when in error
2. Error summary isn't focused on page load
3. Error summary is using a negative contraction
4. The markup for the radios looks like it needs review - there's a fieldset inside a fieldset.
5. I don't think the error message next to the radios is actually semantically linked in any way to the question. On the design system markup, the fieldset references the error. I can't see that happening here.

General design stuff:

1. The error styling on the radios is incomplete