This falls into 8.9.3, where there has been no actual contact and the swing has been held by the striker for fear of hitting the opponent, the provisions of 8.6 apply. The player in yellow held for some time and by the time the player in black was preventing the swing, there was doubt as to which shot the striker could play. Therefore, the swing was affected by the opponent who was making every effort to avoid the interference, so a let is allowed.