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1L20 1127 Carmarthen to London Paddington
Departing on 1st January 2026

operated by
Great Western Railway
GBTT
WTT
Route
Location
Pl
Arr
Dep
Arr
Dep
Path
Line
Carmarthen [CMN]
2
1127
1127
Carmarthen Jn [XCI]
pass
1129
Ferryside [FYS]
pass
1137½
Bertwyn Level Crossing
pass
1140
Kidwelly [KWL]
1
pass
1141½
Pembrey & Burry Port [PBY]
1147
1148
1146½
1148
Llanelli [LLE]
UPL
1154
1155
1154
1155½
Llandeilo Jn
pass
1158
Duffryn West
pass
1158½
Cockett West
1
pass
1203½
Swansea Loop West
1
pass
1207½
Swansea Loop East
pass
1210½
Swansea [SWA]
Pathed as Class 80x on diesel from here
joins with 1B07 from London Paddington
Service reverses here, gains coaches here
3
1213
1222
1213
1222
Swansea Loop East
pass
1223½
Neath [NTH]
1233
1234
1232½
1234
Briton Ferry West Jn
pass
1236½
Port Talbot Parkway [PTA]
2
1240
1241
1240
1241½
Margam East Jn
pass
1244½
Margam Moors Jn.
pass
1245½
Stormy
pass
1248½
Bridgend [BGN]
2
1253
1254
1252½
1254
Pencoed [PCD]
pass
1258
Pontyclun [PYC]
1
pass
1302
Leckwith North Jn
½
pass
1311
C
Cardiff Central [CDF]
Pathed as Class 80x on electric from here
2
1314
1318
1315
1318
B
Long Dyke Jn
pass
1320
ML
Marshfield
pass
1324
Ebbw Jn
pass
1326½
Gaer Jn
pass
1327
UM
Newport (South Wales) [NWP]
3
1329
1331
1329
1331
ML
Maindee West Jn
pass
1332
Maindee East Jn
pass
1332½
ML
Llanwern West Jn
½
pass
1334½
Severn Tunnel Junction [STJ]
4
pass
1340
Severn Tunnel West
pass
1341
Severn Tunnel East
½
pass
1344½
Pilning [PIL]
1
1
pass
1346
Patchway [PWY]
1
pass
1349½
Bristol Parkway [BPW]
4
1352
1355
1352
1356
Westerleigh Jn
pass
1400
Hullavington
pass
1406½
Wootton Bassett Jn
1
pass
1413
Swindon [SWI]
1
1419
1420
1418½
1420½
Uffington (Oxfordshire)
pass
1427
Challow
pass
1428½
Wantage Road
1
pass
1430
Didcot Parkway [DID]
2
pass
1434½
ML
Goring & Streatley [GOR]
1
pass
1438½
ML
Reading High Level Jn
pass
1444
ML
Reading [RDG]
10
1445
1447
1445½
1447½
UML
Kennet Bridge Jn
pass
1448½
ML
Twyford West
pass
1451½
RL
Twyford [TWY]
4
pass
1452½
RL
Maidenhead [MAI]
3
5
pass
1456
RL
Slough [SLO]
1 4½
5
pass
1503
RL
Stockley Junction
pass
1513½
RL
ML
Heathrow Airport Jn
pass
1514½
ML
Southall [STL]
2
pass
1516½
ML
Acton West
1
pass
1518
ML
ML
Ladbroke Grove
pass
1521½
ML
3
Portobello Jn (London)
pass
1522
3
Royal Oak Junction
pass
1523
3
London Paddington [PAD]
5
1524
1524
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