Alzheimer's disease - Dementia UK

News and blogs - Dementia UK

Home - Dementia UK

Types of dementia - Dementia UK

First time visit: View without clicking anything

Vascular dementia - Dementia UK

Lewy body dementia (LBD): symptoms, diagnosis and treatment - Dementia UK

Parkinson's - Dementia UK

About dementia - Dementia UK

Causes and risk factors of dementia - Dementia UK

All `id` attributes on a page must be unique, or accessible technologies used by the page 
can stop working.

## Example

The duplicate `id` here makes it unclear which label belongs to which input field:

```html
<label for="name">Your name</label>
<input id="name">

<label for="name">Company name</label>
<input id="name">
```

As a result, accessible technologies like screen readers can fail to read out the 
correct text, or may read out no text at all.

Similar issues can occur when using `aria-labelledby` and `aria-describedby`.

## How to fix

Ensure all `id` attributes on a page are unique. 

## More information

See [Technique H93](https://www.w3.org/TR/2016/NOTE-WCAG20-TECHS-20161007/H93) 
for more information.

duplicate-id

December 2025

November 2025

Dementia UK

	Title / URL	Issues
	Alzheimer's disease - Dementia UKwww.dementiauk.org/information-and-support/types-of-dementia/alzheimers-disease/	6
	News and blogs - Dementia UKwww.dementiauk.org/news/	4
	Home - Dementia UKwww.dementiauk.org/	4
	Types of dementia - Dementia UKwww.dementiauk.org/information-and-support/types-of-dementia/	4
	First time visit: View without clicking anythingwww.dementiauk.org/	4
	Vascular dementia - Dementia UKwww.dementiauk.org/information-and-support/types-of-dementia/vascular-dementia/	2
	Lewy body dementia (LBD): symptoms, diagnosis and treatment - Dementia UKwww.dementiauk.org/information-and-support/types-of-dementia/dementia-with-lewy-bodies/	2
	Parkinson's - Dementia UKwww.dementiauk.org/information-and-support/types-of-dementia/parkinsons/	2
	About dementia - Dementia UKwww.dementiauk.org/information-and-support/about-dementia/	2
	Causes and risk factors of dementia - Dementia UKwww.dementiauk.org/information-and-support/about-dementia/causes-and-risk-factors/	2

Fix duplicate IDs

Dementia UK

Where this issue has occurred