grounds for cancellation of bail, broadly (illustrative and not exhaustive) are: interference or attempt to interfere with the due course of administration of justice or evasion or attempt to evade the due course of justice or abuse of the concession granted to the accused in any manner. The satisfaction of the court, on the basis of material placed on the record of the possibility of the accused absconding is yet another reason justifying the cancellation of bail. However, bail once granted should not be cancelled in a mechanical manner without considering whether any supervening circumstances have rendered it no longer conducive to a fair trial to allow the accused to retain his freedom by enjoying the concession of bail during the trial. These principles, it appears, were lost sight of by the High Court when it decided to cancel the bail, already granted. The High Court it appears to us overlooked the distinction of the factors relevant for rejecting bail in a non-bailable case in the first instance and the cancellation of bail already granted."