Madeline wrote:
It would be brill if the new person was female, and she was told to nominate one of the lads for eviction on the spot!!.

Top idea. And was allowed to actually say what they had done.
"Scott, hi. Yeah I've just nominated you to go!"
It would be cool if they put someone in who isn't afraid to actually speak their mind and stir things up a little.
BUT would anyone do that? Surely they'll be evicted asap if they did? The housemates would hate them and the public would say they were too "full of themselves".