Thing is, institutional investors are generally risk-averse. The information which the company has so far released to us is evidently not sufficient to justify purchase by a risk-averse investor. I don't know why anyone would have thought otherwise. If and when we get confirmation of good flow rates, it might be a different matter.
Ok, the reversed sell at 15.23 has been re-entered just before 1600, 703k and some odd at 11.00.
Someone is clearly unloading a large holding in a hurry. That makes about 1,800,000 sold this afternoon at 11p when the going price was a little over 12p. Surprising it hasn't pulled the price down.