theres a suprise, page-16

It sort of proves that a shareholder changed nominee companies for around 30mil shares - these transfers don't go thru the market.
Argonaut and Evans & Partners probably advised clients to buy and Austock told clients to sell - none of them were big enough to have any effect on the Top20.
Lots of brokers would have bought and sold a million here or there - even I dumped a million at 12c/12.5c(with the balance of my order sitting at the top of the 12.5c sells currently).
I could still be wrong but I don't really think there was a new buyer for 36.5mil shares hidden in HSBC Noms or that ANZ Noms sold 30mil.