Original sentence: Following privatisation, passenger services upon the line were taken over by ScotRail, (part of National Express), and are now operated by First ScotRail with the track and signalling being operated (nationally) by Network Rail
Edited sentence: Following privatisation, passenger services upon the line were taken over by ScotRail, (part of National Express), and are now operated by First ScotRailwith the track and signalling being operated (nationally) by Network Rail