Look out for these special DLR trains that are now under trial

If you’re using the DLR over the next few months, you might see an unusual looking train passing through stations — as testing starts for the new fleet of DLR trains arriving early next year.
DLR B23 test train at Stratford High Street station (c) TfL
Two of the new trains are in London for testing and trials, initially to make sure they fit as designed to fit with the track and stations, and now testing has moved onto integrating with the signalling systems. All these tests are need