I've done life drawing quite a bit so I was quietly confident about this, and again, I'm happy with the results. I'm gonna time myself next time as we weren't told how much time had passed and I was a bit too relaxed with it then found I was rushing some shading when we were told we were nearly done with that pose!
Pose 1 - 30mins
Pose 2 - 20mins
Pose 3 - 20mins
Pose 4 - 20mins
[but rushed cos tutor was discussing my work with me for ages!]