Issues with form field validation

[SiAdcock]

This is a central issue for any bugs relating to form field validation. This may include:

• error styling and when it does and doesn't get applied
• form submission
• error messaging and summaries
• user agent styling and error tooltips
• assistive technology support of error messaging and validation

Using this issue

If you discover any issues relating to form field validation, error styling or error messaging, please add a comment to this issue. I'll keep an up to date list of known issues below.

Known issues

• [ ] In a browser with JavaScript disabled, if a required text input field or textarea has no value, form submission will be prevented. However the empty fields will not have error styling applied, making it difficult for the user to identify which fields are preventing form submission. Introduced in #440