Why Accessibility Matters
Web accessibility ensures that websites and applications can be used by everyone, including people with disabilities. In the United Kingdom, approximately one in five people has a disability of some kind, according to the Department for Work and Pensions. Failing to make digital services accessible means excluding a substantial portion of the population — and a significant potential customer base.
Beyond the moral imperative of inclusion, there is a clear business case for accessibility. Accessible websites tend to perform better in search engine rankings, as many accessibility best practices — semantic HTML, descriptive link text, image alt attributes, clear heading hierarchies — align closely with SEO fundamentals. Accessible sites also work more reliably across different devices, browsers, and network conditions, and they provide a better experience for all users, not just those with disabilities.
Consider the range of situations where accessibility features benefit everyone: captions on videos help users in noisy environments; high colour contrast aids readability in bright sunlight; keyboard navigation assists users with temporary injuries; clear, simple language benefits non-native speakers. Designing for accessibility is, in practice, designing for a better experience across the board.
The Legal Landscape in the UK
The legal framework surrounding web accessibility in the UK is more substantial than many businesses realise.
The Equality Act 2010
The Equality Act 2010 requires businesses and organisations that provide services to the public to make reasonable adjustments to ensure those services are accessible to disabled people. This applies to websites and digital services just as it applies to physical premises. There is no explicit exemption for digital services, and case law has increasingly affirmed that websites fall within the scope of the Act.
Whilst enforcement actions against private sector websites have been less common in the UK than in some other jurisdictions, the legal risk is real and growing. Organisations that fail to address known accessibility barriers may find themselves vulnerable to claims.
Public Sector Regulations
The Public Sector Bodies (Websites and Mobile Applications) Accessibility Regulations 2018 go further for public sector organisations, requiring compliance with the Web Content Accessibility Guidelines (WCAG) 2.1 at level AA. These regulations mandate regular monitoring, accessibility statements, and enforcement through the Equality and Human Rights Commission.
Whilst private sector organisations are not bound by these specific regulations, the Equality Act still applies, and courts have increasingly looked to WCAG as the benchmark for what constitutes a reasonable standard of accessibility.
Understanding WCAG
The Web Content Accessibility Guidelines, published by the World Wide Web Consortium (W3C), are organised around four foundational principles, often remembered by the acronym POUR. Content must be:
Perceivable
Users must be able to perceive the information being presented through at least one of their senses. This includes:
- Providing text alternatives for images that convey information
- Offering captions and transcripts for audio and video content
- Ensuring sufficient colour contrast between text and background (a minimum ratio of 4.5:1 for normal text)
- Not relying on colour alone to convey information
- Ensuring content can be presented in different ways without losing meaning, such as when viewed with assistive technology
Operable
Users must be able to navigate and interact with the interface regardless of how they access it. Key requirements include:
- All functionality must be available via keyboard alone
- Users must have enough time to read and interact with content
- Content must not cause seizures or physical reactions (no flashing content above certain thresholds)
- Navigation must be consistent and predictable throughout the site
- Users must be able to find content through multiple means, such as search, site maps, and clear navigation
Understandable
Information and the operation of the user interface must be comprehensible. This means:
- Using clear, plain language appropriate to the audience
- Ensuring forms provide helpful, specific error messages that guide users towards correction
- Making the site behave in predictable, consistent ways
- Providing clear labels and instructions for interactive elements
- Identifying the language of the page and any passages in a different language
Robust
Content must be robust enough to be interpreted reliably by a wide variety of user agents, including assistive technologies such as screen readers, voice recognition software, and alternative input devices. This requires valid, semantic HTML, proper use of ARIA (Accessible Rich Internet Applications) attributes where native HTML elements are insufficient, and careful testing across a range of assistive technologies.
Practical Steps Towards Compliance
Achieving accessibility compliance need not be overwhelming if approached methodically. A practical strategy involves several phases.
Audit and Baseline
Start with a thorough audit of your existing website using both automated tools and manual testing. Automated tools such as Axe, WAVE, and Lighthouse can identify many common issues quickly, including missing alt text, insufficient colour contrast, missing form labels, and structural problems. However, automated scans typically catch only a portion of accessibility issues — estimates vary, but automated tools generally identify between thirty and fifty per cent of WCAG violations.
Manual testing is essential for catching problems that automated scans miss. This includes testing keyboard navigation through every interactive element, checking that screen readers announce content in a logical order, verifying that custom components are properly labelled, and assessing the overall usability of the site for people using assistive technologies.
Prioritise and Remediate
Prioritise issues by severity, addressing those that prevent users from completing key tasks first. A form that cannot be submitted using a keyboard, a checkout process that traps focus in a modal, or navigation that is invisible to screen readers are higher priority than minor colour contrast issues on decorative elements.
Common high-impact fixes include:
- Adding meaningful alt text to all informative images
- Ensuring all form fields have programmatically associated labels
- Making all interactive elements keyboard accessible with visible focus indicators
- Implementing a logical heading hierarchy that conveys document structure
- Ensuring sufficient colour contrast throughout the site
- Adding skip navigation links to allow keyboard users to bypass repetitive content
Build Accessibility Into Your Process
The most cost-effective approach to accessibility is building it into your development process from the start rather than treating it as an afterthought or a remediation exercise. This means including accessibility requirements in design briefs, using accessible component libraries, testing during development rather than only at the end, and including accessibility criteria in your definition of done.
An Ongoing Commitment
Accessibility is not a one-time project but an ongoing responsibility. As content is added, features are developed, and designs evolve, accessibility must remain a consideration at every stage. Regular audits, user testing with people who use assistive technologies, and team training all contribute to maintaining an accessible digital presence over time.
At GRDJ Technology, we integrate accessibility best practices into every project we deliver, from initial design through development and into ongoing maintenance. We help our clients meet both their legal obligations and their commitment to inclusive design, ensuring their digital services are available to the widest possible audience.