"aggravating circumstances"
in relation to—
(a)[Paragraph (a) deleted by section 1 of Act No. 107 of 1990];
(b)robbery or attempted robbery, means—
(i)the wielding of a fire-arm or any other dangerous weapon;
(ii)the infliction of grievous bodily harm; or
(iii)a threat to inflict grievous bodily harm,

by the offender or an accomplice on the occasion when the offence is committed, whether before or during or after the commission of the offence;