For a conditional offer, the offerer must receive acceptance resulting in the offerer holding more than 50% in order for the offer to be successful. If the offerer is unable to receive acceptances resulting in the offered holding at least 50%, the offer will fail and the shares of those who have accepted the offer will be returned. In other words, accepting shareholders don't get paid and things maintain at status quo.

If the offered achieves acceptance of more than 50% but not able to reach the requisite threshold for delisting or compulsory acquisition, those who have accepted the offer will get paid for their acceptance as the offer is successful. However, as the threshold for deleting is not achieved, company will continue to be listed and those who have not accepted the offer will continue holding shares which are tradeable.

actually all companies have share buy back resolution to be passed in AGM. However, it doesn't mean that they company will definitely effect the share buy back. It is just a general mandate which gives the company the power to buy back share (if opportunities suddenly arise). Without this general mandate, the company will have to hold an EGM everytime they wish to buy back shares, which will costs money and take time. Hope this is clear.