One of the most important things to remember when owning a website, is to make sure you own and control your domain name. Over the years a domain name can gain authority and in some cases become quite valuable. To the business owner their name is like gold dust. Some companies may have bought there domain name when they bought a website, but later find it is registered in the name of the website company and not them. Its worth double checking that you own your domain name and have full access to its control.
TO check who owns your .co.uk domain go to Nominet