QUORUM:

However a quorum is the minimum number of persons who must be present at a meeting in order that the meeting may validly transact the business for that it was convened.

Under Table A, article 53, no business is to be transacted at a general meeting unless a quorum of members is present "at the time when the meeting progressed to business".  In Re: Hartly Baird Ltd it was held such that the words "of the time when the meeting proceeds to business" mean that the quorum is required only at the time when the meeting begins.  There need therefore be no quorm after the meeting has began and it may be legally continued - provided there are at least two persons present who would constitute a valid meeting at common law