Complex sentence: In Autumn 2010 changes were made to allow Cambrian and Welsh Marches line trains to depart in a southerly direction from Platform 3--an upper quadrant signal replaced the previous shunting disc and a facing point lock was added to the points.
Split into simpler sentences: In Autumn 2010 changes were made to allow Cambrian and Welsh Marches line trains to depart in a southerly direction from Platform 3. An upper quadrant signal replaced the previous shunting disc and a facing point lock was added to the points.