I've just found the info in case anyone is interested to know:
Treatment Cycles
For women aged 40 years and below, the maximum number of consecutive cycles allowed is ten stimulated or natural cycles reaching the stage of embryo transfer is permitted. These cycles include those performed in local and foreign centres.
For women above the age of 40 years, the maximum number of consecutive cycles allowed is five stimulated or natural cycles reaching the stage of embryo transfer is permitted. Once a woman turns 45 years of age, all treatment must be stopped.
There is no limit to the number of thawed cycles (frozen embryo cycles) that may be carried out for any woman on the AR programme.