Should I register my domain with more than one extension?
If you are registering a domain name for a UK company, we recommend that you purchase a .com as well as a .co.uk domain if both are available. This removes the possibility of someone entering your domain with an alternate extension and not finding your site, or even worse, finding a competitors site.
If you are a company, you may like to also consider ordering a misspelling of your domain, in case people accidentally spell it incorrectly.