B Ltd has an issued share capital of 1,000 ordinary £1 shares.

B Ltd has an issued share capital of 1,000 ordinary £1 shares. The board of B Ltd has resolved to alter the company's articles of association. Which of the following is correct? 

(i) The articles may be altered by board resolution.

(ii) The articles may be altered by a written resolution of the shareholders.  

(iii) The articles may be altered by a special resolution of the directors.