[9] The station name was simplified to Llantrissant c. 1866,[3] by which time the SWR had amalgamated with the Great Western Railway (GWR) in 1863.

[10] Adjacent to this station was the terminus of the Cowbridge Railway, which opened on 18 September 1865, originally being named Llantrissant.

[3] Under the auspices of Regional Railways sector of British Rail and Mid Glamorgan the station was reopened.

[2] Extensive sidings existed around the station for the coal and mineral traffic generated by the mines in the area.

Originally, it ran to the Cwm Coking Works at Tynant, Beddau, just past the former station Llantwit Fardre, although the track has been totally dismantled and the trackbed is now a cycle path that currently terminates at Westfield Crescent, Cross Inn.

This would require new stations at Talbot Green, Llantrisant, Gwaun Meisgyn and Beddau (Tynant).

[13] A locomotive depot, known as Llantrisant, was situated between the station and Mwyndy Junction, on the eastern side of the curve.

The station has 2 platforms: Mondays to Saturdays there is an hourly service eastbound to Cardiff Central, with most continuing to Newport, Chepstow, Lydney, Gloucester and Cheltenham Spa, as well as an early-morning service to Manchester via Cardiff, Newport and the Welsh Marches Line via Hereford, Shrewsbury and Crewe.

A few early morning and late evening services take the spur to Ninian Park to continue onto Cardiff Central alongside Canton sidings, to retain route knowledge.