Share based compensation
The cost of equity settled transactions is recognized, based upon the fair value at grant date, together with a corresponding increase in the share based compensation reserve in equity, over the period in which the performance or service conditions are fulfilled. The cumulative expense recognized for equity settled transactions at each reporting date until the vesting date reflects the extent to which the vesting period has expired and the Group's best estimate of the number of equity instruments that will ultimately vest. The consolidated income statement expense or credit for a period represents the movement in cumulative expense recognized at the beginning and end of that period.
