Regarding the potential for a fall in share price after the closure of an offer, theoretically that is possible and it would be permitted for officers to point that out.
If BG's offer had closed without an extension, there would have been no other offer on the table and theoretically it could be expected to fall, as at that point BG were not at the level of compulsory acquisition.
Regarding the timing that you refer to, as the majority of shareholders are Broker-sponsored these days, the acceptance is a on-line acceptance and therefore no time allowance for postage is necessary - or am I missing something.
PES Price at posting:
$8.25 Sentiment: None Disclosure: Not Held