Just remembered the trick on Saturday night.
Everyone was sat in the lounge, and Jon gave us his DO pep-talk. Then at the end he said 'Right. It's diving day tomorrow, so it's 10pm. Let's turn in.'
At that point everyone picked up their belongings and all left in an orderly fashion, leaving me and dave c sat looking at each other, mouths open.
I think the words were 'you're f*%$ing joking aren't you' but a couple of minutes later we wandered, bemused towards our room.
When we went down the corridor, everyone was waiting for us at the other end, laughing that we'd fell for it!
Very funny!!
Mark.