What does this mean?
More than one h1 element has been found on the page.
Impact on users
We generally only want a single h1 on a page as this normally describes the page purpose. Having more than one can make a page confusing.
How to fix
Most often this will be caused by a form component having the isPageHeading parameter set to true when there is already a h1 on the page. If this is the case, removing that parameter or setting it to false should fix it.
Ensure the only h1 on the page is displayed at the top of the page contents and contains appropriate copy.
References
- GOV.UK guidance on headings
- Guides to testing headings with a screen-reader: