simpson I hope this helps also:
What name can your limited company use?
There are certain restrictions on the business name you can use. You cannot register the same name as another company, certain words are restricted and names that may cause offence are not permitted. Check the index of company names kept by the Registrar of Companies at Companies House to make sure that another company is not already using your chosen name. You can search for the availability/ acceptability of a preferred name using the Registrar's WebCHeck service.
A company name must be continuously displayed at any place where it does business, at its registered office and its inspection place. The name has to be easily seen and read. It must also appear on all company publications and correspondence, including business letters, websites, cheques, invoices and notices. The company's directors and secretary, if it has one, may be fined if the business name is displayed incorrectly. Where a company shares premises with five or more companies, each company is required to display its name for 15 continuous seconds every three minutes.
The company's place of registration (England and Wales, Wales (only), Scotland or Northern Ireland) and registered number must also be displayed on business letters, order forms, e-mail communications and websites.
You must also display the letters 'ltd' or the word 'limited' after the company name. Other requirements for company names are detailed in BIF 48 A Guide to the Business Names Act 1985 and BIF 459 An Introduction to the Companies Act 2006.