The delights of driverless trains were plain for all to see as a DLR train got stuck in the tunnel under the river for over an hour yesterday.
It was undoubtedly a deeply unpleasant experience for the passengers, packed like sardines during the morning peak when it may have been freezing outside but it was sweltering in the train.
It took an hour for engineers to reach the stranded passengers and for a rescue train to get them out.
DLR management said that the rescue happened as quickly as it could have done, and we have no reason to doubt that. The point is that no amount of superhuman effort by other staff is going to make for a speedy rescue from a stalled train without a driver.