You can access Companies House information via http://beta.companieshouse.gov.uk/
Here is just a brief overview of the information….
· Company overviews and officers
Incorporation Date, When Company Accounts are due, Business Activity, Trading Status, Charges against your business
Director, Shareholder details - Names, address, Nationality, Role and Occupation, Directorships
· Document images
Copies of Annual Returns, Confirmation Statements, Company Accounts
· Disqualified directors
You can search for names of disqualified Directors
· Previous and dissolved names search
· UK establishments
Registered Office (current and previous), SAIL address
As you can see, this is quite extensive and with other company information websites providing additional information, you need to be sure that you keep any personal and private information away from these registers.
If you Google your Company Name, you will see your business name listed, not only at Companies House, but Company Check, Duedil, 192, Endole etc..