Researchers this week said that accessibility should be a much greater concern for website owners and publishers.

According to Graham Charlton, a researcher with E-consultancy, there are at least 8.5 million disabled people in the UK, and 3.5 million of these are not able to use a keyboard.

The E-consultancy report suggests that by failing to cater for disabled web users, sites and services are missing out on a hefty audience. This in turn can have adverse effects on a website's SEO (search engine optimisation).

Chartlon said: "The key thing is that if your website is not accessible to these people, you are missing out on a vast potential market."

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