No idea whether there is a leak but history would suggest that often large increases in trading volume are closely followed by news - which would tend to indicate that someone knew about the news prior to the release. Not always the case of course. To be fair the news normally comes out within a day of the increase in volume - in this case it has been running since Friday and still no news so could just be someone keen to get on board in a reasonable way.
9SP Price at posting:
2.1¢ Sentiment: Hold Disclosure: Held