The service provisions of s233 of the Local Government Act 1972 apply to notices served under a statute by a local authority (including in the landlord and tenant context), not just to those notices served in fulfilment of a public duty.
In Birmingham City Council v Bravington [2023] EWCA Civ 308, the Court of Appeal considered whether s233 of the 1972 Act applied to a notice served under the Housing Act 1985, and concluded that it did.
Section 233 addresses a local authority’s service of notices, orders or documents required or authorised under any enactment. It states that a notice may be served on the person by leaving it at his proper address.