If don’t have a written tenancy (so you have a verbal tenancy), please read this article before serving notice.
You require a section 21(1)(b) notice.
Next, the notice needs completing. The most important part is getting the date correct. With a 21(1)(b) notice, it is quite easy to get the date right because there is no requirement to ensure it ends on any particular day.
Completing the form
To: Insert all names of all tenants
Of: Insert tenancy address
Landlord: Insert your name
Of: Insert your address
Dwelling-house known as: Insert tenancy address
After the: Insert date of expiry of notice … see below …