I left my computer in the queue when I went out.  When I got back there was no sign that it had got to the front and then been bumped for doing nothing or that it had fallen asleep and made no progress.

So I started again.  After two and a half hours of telling me that I had less than half an hour to wait the reducing time bar was tantalizingly close to disappearing when I had to go out again.

Once more on my return there is no sign of anything having happened.  I'm making one more attempt and goodness me but the system says I'll be there in less than half an hour.