Complex sentence: The station opened in September 1993 with just one platform (on the north side of the line), but a second platform came into use when the line to Annan was restored to double track in August 2008.
Split into simpler sentences: The station opened in September 1993 with just one platform, on the north side of the line. A second platform came into use when the line to Annan was restored to double track in August 2008.