Complex sentence: For forty years a passenger service operated, but this was withdrawn and now, with the exception of the occasional enthusiasts' railtour, the line serves the freight needs of Marchwood Military Port, having also served the same function for Fawley Refinery until 2016.
Split into simpler sentences: For forty years a passenger service operated, but this was withdrawn with the exception of the occasional enthusiasts' railtour. The line serves the freight needs of Marchwood Military Port, having also served the same function for Fawley Refinery until 2016.