I've just read on the official site that they are doing the show on Thursday, as cymru originally said.
So we have to wait an extra day but hopefully they will show it on the 8:30 program on C4 before the eviction announcement.
I'm looking forward to Jonny doing Alex's voice too!
On the C4 site it says that the show will be performed on the rich side, so presumably they all get to go over there then. I wonder how long for!!