Original sentence: Between South Ruislip station and Old Oak Junction, the GWR line was progressively run down and in many places is now single-track, including the stretch running past the Tube station.The GWR station closed when the Central line was extended on new tracks from North Acton to Greenford station in 1947
Edited sentence: Between South Ruislip station and Old Oak Junction, the GWR line was progressively run down, and in many places it is now single-track, including the stretch running past the tube station.The GWR platforms closed when the Central line was extended on new track from North Acton to Greenford station in 1947