(1)In reckoning for the purposes of this Part a period expressed as a period from or before a given date, that date shall be excluded.
(2)For the purposes of this Part a working day means a day other than a Saturday, Sunday, Christmas Day, Good Friday or a bank holiday; and a notice given after 4.30 p.m. on a working day shall be treated as given on the next working day.
(3)In subsection (2) a “bank holiday” means a day which is a bank holiday under the [1971 c. 80.] Banking and Financial Dealings Act 1971 in the locality in which the street in question is situated.