Looking further into this, there are actually quite a few changes with the HOWL. From Shrewsbury there's now 5 through services plus 2 shorts to Llandrindrod. Departures at:
0420 (to Llandrindrod)
0522
0856
1121
1517
1807
2129 (to Llandrindrod)
Similarly at the south end of the line it's 5 through services plus 2 short workings to Llandovery.
0512 Carmarthen to Llandovery
0605
0927
1159
1437
1839 (all Swansea to Shrewsbury)
2134 (Swansea to Llandovery).
Times for Llandovery are now on RealTimeTrains and, going by the schedule from Llandrindod for Monday 19th December 2022, it is worth noting that later trains will be on offer:
From Shrewsbury:
2V00 0420 Shrewsbury - Llandrindod, arr. 0545
2V02 0626 Llandovery - Swansea, arr. 0805
2V04 0522 Shrewsbury - Swansea, arr. 0931
2V06 0856 Shrewsbury - Swansea, arr. 1301
2V08 1121 Shrewsbury - Swansea, arr. 1534
2V10 1517 Shrewsbury - Swansea, arr. 1937
2V12 1807 Shrewsbury - Swansea, arr. 2206
2V14 2129 Shrewsbury - Llandrindod, arr. 2300
2V16 2243 Llandovery - Swansea, arr. 0016
To Shrewsbury:
2M02 0550 Llandrindod - Shrewsbury, arr. 0738
2M04 0547 Swansea - Shrewsbury, arr. 0946
2M06 0909 Swansea - Shrewsbury, arr. 1313
2M08 1140 Swansea - Shrewsbury, arr. 1543
2M10 1418 Swansea - Shrewsbury, arr. 1832
2M12 1819 Swansea - Shrewsbury, arr. 2221
2M14 2115 Swansea - Llandovery, arr. 2237
2M16 2310 Llandrindod - Shrewsbury, arr. 0034
On Saturdays the offering, going by timings at Llandovery, will be slightly different with 6 services each way and timings tweaked, in most cases, by only a minute or two (although there are some slightly bigger timing variations). Also the last one from Llandovery does not go to Swansea:
Southbound:
2V04 0524 Shrewsbury - Swansea, arr. 0934
2V06 0856 Shrewsbury - Swansea, arr. 1303
2V08 1126 Shrewsbury - Swansea, arr. 1539
2V10 1525 Shrewsbury - Swansea, arr. 1939
2V12 1808 Shrewsbury - Swansea, arr. 2212
2V16 2243 Llandovery - Carmarthen, arr. 0011
Northbound:
2M04 0549 Swansea - Shrewsbury, arr. 0945
2M06 0908 Swansea - Shrewsbury, arr. 1310
2M08 1143 Swansea - Shrewsbury, arr. 1545
2M10 1430 Swansea - Shrewsbury, arr. 1832
2M12 1818 Swansea - Shrewsbury, arr. 2226
2M14 2115 Swansea - Llandovery, arr. 2237
However the Sunday schedules are still shown as two each way but they may have yet to be uploaded. The planning of the improved Sunday service may not be helped much by the fact that, according to RTT, there is a planned evening freight path from Margam TC to Llanwrtyd and return.
HTH,
Dave