From the Companies House website:
"We are a small company / dormant company (GBA3) / flat management (GBA9) / golf club etc. Why do I need to file documents?
The Companies Act does not distinguish between the sizes or types of private limited companies. All directors benefit from limited liability if the company folds. If a person wishes to register a company with limited liability to gain protection under the Companies Act, he must also comply with all the filing requirements of the Act.
These filing requirements enable anybody interested in the company to find out any relevant statutory information before becoming involved with a company. They will be able to find out how a company and/or its directors have performed in the past. This gives investors and customers a certain amount of protection before money changes hands."
See here for further relevant information:
http://www.companieshouse.gov.uk/about/gbhtml/gba3.shtml
Chris