DLR trains will now have the first and last set of doors locked shut at all times to protect on board staff.
For some time chains have been placed across the carriage interior to stop people sitting in areas of a carriage.
These new measures have raised fears that passengers are being forced into a smaller area and using fewer doors. Unlike the tube, for example, most stations are unstaffed and have no barriers restricting passenger numbers reaching a platform and boarding trains.
And it means no longer “driving” the train for some time to come – for now at least.
TfL state staff will keep an eye out for vulnerable passengers and ensure trains do not depart until everyone had boarded.