Making the right decision when choosing you domain name is very important. If you are selling to the UK only, a .co.uk domain will probably be best. If you are selling worldwide, it may be better to find a .com. Your website anyway will be seen anywhere in the world if it comes up in a search for an item or service on your website. It should be remembered that the domain name should contain at least one keyword that describes your business. Don’t use an acronym unless you really have to. You might want the website address to be short and neat but it’s better that’s it’s longer and contains wording that will be picked up by the search engines.
It is worth considering also that here in the UK, people put UK at the end of their search phrase, in order to bring up the UK results . Therefore having a .co.uk would help to ensure that you get a better ranking for those searches.