Complex sentence: The MDR built its own three-platform station to the north of the GWR one, although between 1 March 1883 and 30 September 1885, MDR trains also served the GWR station, on a short-lived service running to Windsor.
Split into simpler sentences: The MDR built its own three-platform station to the north of the GWR one. Between 1 March 1883 and 30 September 1885, MDR trains also served the GWR station, on a short-lived service running to Windsor.