At an equal pace or rate.
What are the rights in respect of voting attached to [a class of shares] … which are to be unalterable save with the necessary consents of the holders? The only right of voting which is attached in terms to the shares of that class is the right to have one vote per share pari passu with the other ordinary shares of the company for the time being issued. That right has not been taken away. (Greenhalgh v Arderne Cinemas Ltd  1 All ER 512, 516 (Lord Greene MR))