There are many aspects of compliance to be considered with any website design, these range from w3c who govern correct coding on the internet, through to ensuring that terms and conditions on web shops meets with current legislation.
The w3c consortium develops standards for internet technologies, they offer tools for website designers and web-masters to parse their code and check for errors, this is an important stage of website designing, as correct coding on the pages is believed to be an element of the search engines algorithm, although nobody is sure of this. That being said, having correct coding on pages is a good way to know that all web browsers will display your pages in the way it was designed to show.
When establishing an on-line shop there are certain rules which must be followed, these relate specifically to on-line retailing and the use of certain payment providers. We can help you to make sure that your site is compliant.
Also, dependant on what industry you are in, there may be specific rules, or best practices regarding availability of content for users who, for example, are partially sighted, again, we as a uk design and seo company, can help you to make it display correctly for each type of site visitor you expect to attract.