Limited liability is a non-issue because company law now means that it is of little use to company directors in protecting themselves against being personally liable for company debts. If you are the kind of person who is reasonably well-organised and who can cope with deadlines, and if you have access to good accountancy and tax advice then you should seriously consider forming a company. Otherwise you might find that the additional responsibiliies outweigh the benefits of doing so. Talk to your professional advisor before making a final decision either way.