RE:RE:More shares.Don't think they're related. Calibre mentioned in the update they're looking to enhance working capital to deal with either project overruns or to action opportunities with respect to the mine build (similar to how they pulled certain phase two items forward into phase 1). The shelf prospectus is exactly that.
I'm not a securities lawyer, but I'm pretty sure any merger scenario is in no way facilitated by a shelf prospectus... it just gives them the ability to raise money quickly when market conditions are favorable (like during a rising gold market).