Are Section 17 notices applicable to residential tenancies?

[tenet-tenant]

LL claims I owe rent for a tenancy which ended three years ago.
However, Section 17 of Landlord and Tenants (Covenants) Act 1995 says a tenant won't be liable to pay unless the landlord serves them with a notice within six months of the missed payment, stating the charge is due.
Does this apply to residential tenancies or only commercial tenancies?

[KTC]

From a quick read, well yes, but that section doesn't say what you think it says.

This section applies where a person (“the former tenant”) is as a result of an assignment no longer a tenant under a tenancy but—

That doesn't say former tenant as a result of the tenancy ending.

[Namaste]

Commercial tenancies only as far as I am aware

[KTC]

Commercial tenancies only as far as I am aware

"“tenancy” means any lease or other tenancy and includes—

(a) a sub-tenancy, and

(b) an agreement for a tenancy,

but does not include a mortgage term;"

Nowhere I can see within the Act does it restrict it to non-residential tenancies.