56 Service of documents.E+W+S
(1)Any notice or other document required or authorised to be served under this Act may be served either—
(a)by delivering it to the person on whom it is to be served; or
(b)by leaving it at the usual or last known place of abode of that person or, in a case where an address for service has been given by that person, at that address; or
(c)by sending it in a pre-paid registered letter, or by the recorded delivery service, addressed to that person at his usual or last known place of abode or, in a case where an address for service has been given by that person, at that address; or
(d)in the case of an incorporated company or body, by delivering it to the secretary or clerk of the company or body at their registered or principal office, or sending it in a pre-paid registered letter, or by the recorded delivery service, addressed to the secretary or clerk of the company or body at that office.
(2)Where any such notice or document is required or authorised to be served on any person as being the owner or occupier of any monument or other land—
(a)it may be addressed to the “owner” or (as the case may require) to the “occupier” of that monument or land (describing it) without further name or description; and
(b)if the usual or last known place of abode of the person in question cannot be found, it may be served by being affixed conspicuously to the monument or to some object on the site of the monument or (as the case may be) on the land.