Complex sentence: The Wear & Derwent was leased by the S&DR from 1845; later a line to bypass the incline was approved in June 1862, opening in 1867 for mineral traffic and March 1868 for passengers.
Split into simpler sentences: The Wear & Derwent was leased by the S&DR from 1845. Later a line to bypass the incline was approved in June 1862, opening in 1867 for mineral traffic and March 1868 for passengers.