The first fully refurbished unit, 320415, entered service on 15 August 2016. The unit was painted in ScotRail Saltire livery and had received a full internal refurbishment, including an internal repaint, new floor vinyl and new blue 'saltire' seat coverings, as well as the fitting of a large accessible toilet. Subsequent converted units would be fully refurbished and the initial three units were later returned to Doncaster Wabtec works for refurbishment. The conversion and refurbishment of all seven Class 320/4 units was completed in January 2017.