Without daylight saving time the change over is midnight in Western Australia and we are 7 hours ahead of London which puts your change over time around 5pm. Best to check around the same time each day.
It varies, but I usually find it around 11AM EST. I don't know what that translates as UK time, but I am on the East Coast of the US. That is not a definate time, just what I find to be mostly true.
jrob, you seem to answer almost any question. I admire your helpful (if that is not an existing word, it ought to be) attitude. Good on you.
I just love embroidery and was helped by so many generous people, I just want to pay them back by trying to help others.