“Any demand for payment notice or other documents required or authorised to be given to the Lessee shall be well and sufficiently given if sent by the Lessor or the Lessor’s Agent through the post by registered post or recorded delivery letter addressed to the Lessee at the flat or attached to the door or doors thereto Any demand notice or other document required or authorised to be given by the Lessee shall be well and sufficiently given if left or sent through the post by registered or recorded delivery letter addressed to the Lessor at the last known address or registered office of the Lessor and any demand notice or other document sent by post shall be deemed to have been served forty-eight hours after such posting.”
“Where an Act authorises or requires any document to be served by post (whether the expression “serve” or the expression “give” or “send” or any other expression is used) then, unless the contrary intention appears, the service is deemed to be effected by properly addressing, pre-paying and posting a letter containing the document and, unless the contrary is proved, to have been effected at the time at which the letter would be delivered in the ordinary course of post.”