Registering a limited company is a specialist subject, please contact us with your requirements.
A Limited Company is a "separate person" in law. So it is not the same as being a trader or in a partnership under self-assessment.
A Limited Company pays Corporation Tax, not Income Tax.
A Limited Company must file its Accounts with Companies House - which means that the Accounts become a public document - anyone can get a copy.
It is called "Limited" because the liability of the company owners - the shareholders - will only be their paid up value of their shares if the company gets in financial difficulties. The main exceptions to this are if the shareholders have acted illegally or have been negligent.