Complex sentence: An engine shed was also situated here before being moved to the opposite side of the line near the end of the retaining wall, but it has since been replaced by the new Penzance TMD outside the station at Long Rock.
Split into simpler sentences: An engine shed was also situated here before being moved to the opposite side of the line near the end of the retaining wall. It has since been replaced by the new Penzance TMD outside the station at Long Rock.