and then reveal to the whole group. I don't believe HMs vote the same in public as in private, therefore they should nominate first in private and then confirm in public - I think there would me some very embarrassed faces and a lot of squirming.

I love the way the always explain they didn't mean what the said in the way they said it

BB will do something to change the nominees if they don't like who gets the most nominations. Face to face nominations are pretty pointless in this series of BB. It's just designed to start more arguments.
My guess is Pav and Christopher will get the most nominations. But Winston and Chris may pick up a few votes as well. BB clearly wants Chris out.

what show them what they said in the diary room then they wont go the easy option

Big Brother producers have never shown enough intelligence to do that . It's an obvious strategy............I agree !