Variation of class rights:

It is only necessary to follow the variation of class rights procedure (and a dissenting minority can only apply to the court for cancellation)  if what is proposed amounts to a variation of the class, right of itself.  It is not a variation of class rights:

to issue shares of the same class to allottees who are not already members of the class (unless the defined class rights prohibit this);

WHITE v. BRISTOL AEROPLANE CO.

The company made a bonus issue of new ordinary and preference shares to the existing ordinary shareholders who alone were entitled under the article to participate in bonus issues.  The existing preference shareholders objected that by reducing their proportion of the class of preference shares the bonus issue was a variation of class rights to which they had not consented.