I thinm there's a good chance they haven't announced anything yet because they don't know for sure. Could be andy is hoping to go on but until they get on stage maybe this morning/afternoon to run through it he can't be 100% that whatever support/strapping he gets on that knee is going to be enough.
I am the friend emma mentioned - we got the last standing tickets at about 2.02pm and made it into place just in time for the cell phone announcement! So worth the lack of sleep and the cold!