3.12 Duplicate ARIA id (L)
3.12.1 WCAG 4.1.1 (A) - Desktop, Automated findings
On the Case Summary Overview page, two different elements are labelled using the same ID attribute: govuk-notification-banner-title
. When multiple elements in a web page share the same ID value, assistive technologies are likely to recognize only the first, and ignore others. This may break the accessibility of labels.

FIGURE 3.14: Section with duplicate ARIA id highlighted on Case Summary Overview page
3.12.2 Code Snippet
<h2 class="govuk-notification-banner__title" id="govuk-notification-banner-title"> Important </h2>
3.12.3 Recommendation
Change the ID so that each one is unique, for instance, id="govuk-notification-banner-title-1"