12.—(1) An act required by these Rules, a practice direction or a direction to be done on or by a particular day must be done before 5pm on that day.
(2) If the time specified by these Rules, a practice direction or a direction for doing any act ends on a day other than a working day, the act is done in time if it is done on the next working day.
(3) In this rule “working day” means any day except a Saturday or Sunday, Christmas Day, Good Friday or a bank holiday in Scotland under section 1 of the Banking and Financial Dealings Act 1971(1).