As kira000 says, you are a lodger if the landlord lives in the same house and you share facilities. You are a tenant if you live separately from the landlord.
As you say you are living separately from the landlord then you are a tenant and have much greater legal rights. Lodgers have very few, if any, rights and can be evicted without any legal process. Your landlord may call you a lodger but you are actually a tenant. Do you have any form of Agreement with the landlord? Anything in writing?
It does also mean that, as a tenant, your deposit must be protected in a tenancy deposit scheme.
I'm intrigued as to why your landlord would say that you are a lodger? If this is to get round legal responsibilities then it wont work. Just calling your tenant a lodger doesn't change the fact that he is, legally, a tenant.
As a tenant you would be expected to do your own cleaning.