Complex sentence: The line opened in 1874, and for the first few years trains ran to and from Westenhanger railway station on the main line, then in 1888 Sandling Junction opened with four platforms, two for the main line and two for the branch.
Split into simpler sentences: The line opened in 1874, and initially trains ran to and from Westenhanger railway station on the main line. However in 1888 Sandling Junction opened with four platforms, two for the main line and two for the branch.