We who have to deal with queues for security in Australian airports don't know how lucky we are. I've just transferred from T1 to T4 at LHR. The line to go through security took 75 minutes. The total transfer time was 100 minutes. I was in the Fast Track line as well. This is to go from one secure area to another. And the inspection was even more cursory than it is in Australia apart from the ferocious dragons tackling unfortunate punters with more than one carry on item .