I was away over Christmas. when I got home I recieved a card from the Royal Mail saying that it was unable to deliver an item of mail because the sender had not put enough postage on it.
Turned out to be my job offer.
My experience of HR people everywhere is that they're devious, under-hand, back-stabbing, penny pinching, jobs-worth scum (who'll be first against the wall come the revolution) so promising pay-rises, green-circling then blocking by stealth while the utterly useless AUT do nothing in protest would seem likely.
ps, happy new year (!)