The obvious question is "Why?" I checked out a certain curly haired young man singing it on the tubular website* and noticed that there appears to be a whole verse missing from the NZ lyric sheet (the verse that starts "Just give me a number instead of my name...") that's in the Link above!
I read this too. Sir Tim is not a happy bunny. Apparently they decided to miss out two of the songs as well (didn't say which ones). Sir Tim said they perform it as written or not at all. I think there have now been apologies all round, and the show reinstated to its original format!
Thanks for the reminder of how it should be done, Jo! Research is very important in these matters.