An electric bus caught fire on Sunday while it was charging at a depot, causing five other vehicles to become engulfed, as eyewitnesses described hearing an explosion" like a jet". Fire crews were called to the Metroline bus depot in Potters Bar, Hertfordshire, after locals raised the alarm at around 2. 30pm. Eight fire engines attended the scene-evacuating neighbouring properties and fire-proofing the remaining buses.At the height of the blaze, six Transport for London( TfL) buses-two hybrid el