Complex sentence: As a landlord, you cannot evict your tenant if they have a protected tenancy but in some instances the tenant may agree to downsize to a smaller property but the protected tenancy agreement would transfer to the new property.
Split into simpler sentences: As a landlord, you cannot evict a sitting tenant who has a protected tenancy. In some instances the tenant may agree to downsize to a smaller property and the protected tenancy agreement would transfer to the new property.