Well, yes. He's out of work now:Scott Cam.
In this interview with Andrew Blackwell who is in charge of BB at 7, it says that the narrator is a voice over artist. So I think the robotic voice is only for the promos.After watching past episodes this week to hype myself up for Monday, I'm really looking forward to the new Big Brother voice style. Leon CH9 voice wasn't as booming as I remember. The robot style is a new take on the concept and a smart move by 7 to rebrand away from the nine era. The advert when this creep robot voice said "Australia I never went away" was so good!