Complex sentence: The Down line between Hawick and Longtown was lifted by April 1971, the Up line was lifted in February 1970, and the entire route between Longtown to Newtongrange was removed by early 1972.
Split into simpler sentences: The Down line between Hawick and Longtown was lifted by April 1971, the Up line having been lifted as early as February 1970. The entire route between Longtown to Newtongrange was removed by early 1972.