IF (very big if) there is one, it could present anytime, although, again IF, one would expect it to be prior to next Monday's vote, so Fri PM is a very distinct possibility, IF, If, if...
The 'rival' Sirtex (SRX) bid turned up on the Fri before the SRX SH vote, mid afternoon from memory, so the 'vote' got delayed...
I suspect, and am cautiously optimistic of the likelihood, that IF it's happening, it's likely to be in the latter part of this week...
Time often reveals all, patience is the inherent virtue...