First 43 timetable was
From Swords 0815R 0940 1105 1400 1540 1700 1820 2125 2245
From Talbot St. 0900 1025 1315 1440 1620 1740 2205 2330.
R - from Swords roundabout (Feltrim Lane).
The overlap must have been between 1440 and 1540. Looks like the 1440 from city returned empty from Swords while the 2nd Uni went light to Swords to take up at 1540.