15 The evidence suggests that Phillips Fox was still conducting business at 5.35 p.m. on 2nd June. There is no evidence when their office is closed for business. Although in past years, close of business might have meant 5 o'clock in the afternoon, I do not think it can be assumed that in the modern business world the expression still has that meaning. It is a notorious fact that, although banks may close at 4.00 p.m. on all week days except Fridays, when they close at 5.00 p.m., other kinds of commercial and retail businesses remain open until later than 5.00 p.m. on a weekday. There is no evidence when most solicitors close their offices. I doubt whether such evidence could be obtained as it is well-known that, while some legal offices close at 5.00 p.m., others remain open until later. Quite a few remain open until 5.30 p.m. and others even later still. The hour tends to vary according to the nature of any one firm's practice. For these reasons, the expression "the close of business" was ambiguous. It was also submitted on behalf of the defendant that the expression derived its meaning from the expression "ordinary business hours", an expression which is occasionally used in the Supreme Court Rules: see, for example, Rules 58.01, 58.03 and 66. So it was submitted that ordinary business hours meant between 9 a.m. and 5 p.m. on week days. One flaw with that argument is that the expression "ordinary business hours" is as ambiguous as the expression "the close of business". The order is, therefore, expressed in ambiguous terms.