When will Australia bat to tomorrow?

Seems like a strange decision to me, even if England are so poor. Runs are not important for England anymore. Ponting has made sure of that

If Australia bat until lunch, they are giving England a slight chance of batting the match out.

Psychologically I think it better to bat knowing that you are batting out 1 and a half days than 2 plus days, no matter how bad the batting is.