9. Losses per share

Basic losses per share are calculated by dividing the net loss attributable to shareholders for the year by the weighted average number of ordinary and preference shares in issue during the year, excluding ordinary and preference shares purchased by the Company and held as treasury shares (note 22).

The diluted losses per share are calculated by adjusting the weighted average number of ordinary shares outstanding to assume conversion of all dilutive potential ordinary shares. The Company has one category of dilutive potential ordinary shares: share options. For the share options a calculation is done to determine the number of shares that could have been acquired at fair value (determined as the average annual market price of the Company's shares) based on the monetary value of the subscription rights attached to outstanding share options. The number of shares calculated as above is compared with the number of shares that would have been issued assuming the exercise of the share options. The difference is added to the denominator as an issue of ordinary shares for no consideration. No adjustment is made to net loss (numerator).