The following forms were all introduced by the Companies Act 2006 for companies. Any chnages made after the 1 October 2009 should be made using these forms.

The follwoing forms are all available at this link-

http://www.companieshouse.gov.uk/forms/formsOnline.shtml

Form AD01 – Change of registered office address

Form AP01 – Appointing a person as a director
Form AP02 – Appointing a corporate director
Form AP03 – Appointing a person as a secretary
Form AP04 – Appointing a corporate secretary 

Form TM01 – Terminating a director
Form TM02 – Terminating a secretary 

Form CH01 – Changing the details of a person appointed as a director 
Form CH02 – Changing the details of a corporate director 
Form CH03 – Changing the details of a person appointed as a secretary
Form CH04 – Changing the details of a corporate secretary

Form AA01 – Changing accounting reference date
Form AA02 – Filing Dormant Accounts
Form AR01 – Annual Return
Form DS01 – Striking off a company
Form SH01 – Allotment of shares including statement of capital
Form IN01 – Registering a new company