Not all tenancies are assured shorthold tenancies.
One fairly common exception is where the landlord is renting out self-contained accommodation in the same building where he (or she) lives.
Note that this is not
The normal situations where a resident landlord tenancy agreement is needed is where you are renting out a ‘granny annexe’ or ‘garden flat’ and live in another part of the same building (ie not another building at the other end of the garden).
You also need to use a slightly different form of tenancy agreement. Which is why we have our version on Landlord Law.
Landlord Law members will find it here.