And if you look at the footage, Freddie isn't the only one awake and listening. There was clearly others sitting up. I think one was David.
Edited to add: If you freeze it at 5:24, you can see David leaning up on his elbow and someone else sitting up in bed on the far side of the room and possibly someone sitting up at the end of the row where David is located. Freddie isn't one of the those sitting up. We can see him lying in his bed.
http://www.channel4.com/bigbrother/v...c78115/play.c4