Complex sentence: Prior to this, Cwmbran had been without a train service for 24 years, its original station having been on the Newport-Blaenavon branch line which ran to the west of the town centre.
Split into simpler sentences: Prior to this, Cwmbran had been without a train service for 24 years. Its original station was on the Newport-Blaenavon branch line, which ran to the west of the town centre.