All the third-rail only Class 378s operated by London Overground have now received their additional coach, bringingthem up to five cars in length. The final set, 378154, received its additional vehicle in early March, completing the upgrade of 378135-154 which are used on the East London lines. Work has now started to lengthen dual voltage sets, with 378201 being taken to Bombardier in Derby for the work and being returned on March 5 with new coach 38401 added.
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