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1L20 1127 Carmarthen to London Paddington
Departing on 7th January 2026

operated by
Great Western Railway
5 coaches
Carmarthen - Swansea
802012
10 coaches
Swansea - London Paddington
800014
800032
GBTT
WTT
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Route
Location
Pl
Arr
Dep
Arr
Dep
Arr
Dep
Dly
Path
Line
Carmarthen [CMN]
Pathed as Class 80x on diesel at 125mph
2
1127
1127
1127
U2
Carmarthen Jn [XCI]
pass
1129
pass
1129
UU
Ferryside [FYS]
pass
1137½
pass
1137
Bertwyn Level Crossing
pass
1140
No report
Kidwelly [KWL]
1
pass
1141½
No report
Kidwelly Junction
pass
1142
No report
Pembrey & Burry Port [PBY]
1147
1148
1146½
1148
N/R
1148
Llanelli [LLE]
2
1154
1155
1154
1155½
1153
1154¾
Llandeilo Jn
pass
1158
pass
1157
Duffryn West
pass
1158½
pass
1157¼
-1
Gowerton [GWN]
2
pass
1202
pass
1200
-1
Cockett West
1
pass
1203½
pass
1201¾
-1
Swansea Loop West
1
pass
1207½
pass
1205½
-1
UM
USL
Swansea Loop East
pass
1210½
pass
1209¾
USL
USM
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
1212
1238¼
+16
USM
USM
Swansea Loop East
pass
1223½
pass
1240
+16
Landore Junction
pass
1224½
pass
1241¼
+17
USM
UM
Llansamlet [LAS]
2
pass
1227½
pass
1244
+16
Skewen [SKE]
2
pass
1229½
pass
1246¼
+16
Neath [NTH]
2
1233
1234
1232½
1234
1248¾
1250½
+16
Briton Ferry West Jn
pass
1236½
pass
1253¼
+16
Port Talbot Parkway [PTA]
2
1240
1241
1240
1241½
1256¾
1258¼
+16
Port Talbot East
pass
1242½
No report
Margam Middle Jn
pass
1243½
pass
1259½
+16
Margam East Jn
pass
1244½
pass
1300¾
+16
Margam Moors Jn.
pass
1245½
pass
1302¼
+16
UM
Pyle [PYL]
2
pass
1247
pass
1303½
+16
Stormy
pass
1248½
pass
1305¼
+16
At platform
Bridgend [BGN]
2
1253
1254
1252½
1254
1309
1310½
+16
UM
UM
Tremains
pass
1255
pass
1312½
+17
Pencoed Up Passenger Loop
pass
1257½
No report
Pencoed [PCD]
2
pass
1258
pass
1314½
+16
Llanharan [LLR]
1
pass
1300
pass
1316½
+16
Llantrisant [LTI]
pass
1301½
No report
Pontyclun [PYC]
1
2
pass
1302
pass
1318¾
+16
Miskin
pass
1304
pass
1320½
+16
St Fagans L C
pass
1308½
pass
1324½
+16
Leckwith North Jn
½
pass
1311
pass
1326¾
+15
UM
C
Cardiff West
pass
1313½
No report
Cardiff Central [CDF]
Pathed as Class 80x on electric from here
2
1314
1318
1315
1318
1330
1332½
+14
C
B
Cardiff East
pass
1318½
pass
1333¾
+15
Long Dyke Jn
pass
1320
pass
1335
+15
B
UM
Moorland Road Junction
pass
1320½
pass
1335¾
+15
Pengam Jn
pass
1321
pass
1336
+15
Rumney River Bridge Jn
pass
1321
pass
1336¼
+15
Marshfield
pass
1324
pass
1339
+15
Ebbw Jn
pass
1326½
pass
1341½
+15
UM
UM
Gaer Jn
pass
1327
pass
1342
+15
UM
Newport (South Wales) [NWP]
3
1329
1331
1329
1331
1344¼
1345¾
+14
UM
UM
Maindee West Jn
pass
1332
pass
1347¼
+15
Maindee East Jn
pass
1332½
pass
1347¾
+15
ML
East Usk Jn.
pass
1333½
pass
1348¾
+15
Llanwern West Jn
½
pass
1334½
pass
1349¾
+15
Magor
pass
1338½
pass
1352½
+14
Severn Tunnel Junction [STJ]
4
pass
1340
pass
1355¼
+15
UM
UT
Severn Tunnel West
pass
1341
pass
1356
+15
Severn Tunnel East
½
pass
1344½
pass
1359¾
+15
Pilning [PIL]
1
1
pass
1346
pass
1400½
+14
Patchway [PWY]
1
pass
1349½
pass
1404
+14
Bristol Parkway [BPW]
4
1352
1355
1352
1356
1407
1409¼
+13
UT
UB
Westerleigh Jn
pass
1400
pass
1414
+14
Chipping Sodbury
pass
1401½
pass
1415½
+14
Badminton
pass
1403½
pass
1417¾
+14
Hullavington
pass
1406½
pass
1420¼
+13
Little Somerford
pass
1409
pass
1427¾
+18
Wootton Bassett Jn
1
pass
1413
pass
1434¾
+21
UB
UM
Rushey Platt
pass
1417
pass
1438½
+21
UM
UR
Swindon [SWI]
1
1419
1420
1418½
1420½
1441
1443¼
+22
UR
UM
Highworth Jn
pass
1421½
pass
1445½
+24
Swindon Stratton Green
pass
1422
pass
1446
+24
Swindon South Marston Jn
pass
1422½
pass
1446¼
+23
Bourton
pass
1423½
pass
1447¾
+24
Uffington (Oxfordshire)
pass
1427
pass
1450½
+23
Challow
pass
1428½
pass
1451¾
+23
Wantage Road
1
pass
1430
pass
1455
+25
Steventon
pass
1432½
pass
1456½
+24
Milton Junction
pass
1433
pass
1457½
+24
Foxhall Jn [XJF]
pass
1434
pass
1458¼
+24
Didcot West End
pass
1434½
No report
Didcot Parkway [DID]
2
pass
1434½
pass
1459
+24
Didcot East Jn
pass
1434½
pass
1459¼
+24
Moreton Cutting
pass
1435½
pass
1459½
+24
Cholsey [CHO]
2
pass
1436½
pass
1501
+24
Goring & Streatley [GOR]
1
2
pass
1438½
pass
1502¾
+24
ML
Pangbourne [PAN]
pass
1440½
pass
1504½
+24
Tilehurst [TLH]
2
pass
1442½
pass
1505¾
+23
Tilehurst East Jn.
pass
1443
pass
1506
+23
Reading High Level Jn
pass
1444
pass
1507½
+23
ML
Reading Main Line West
pass
1444½
pass
1508¼
+23
Reading [RDG]
10
1445
1448
1445½
1448
1509
1510¼
+22
UM
UM
Reading Main Line East
pass
1448½
pass
1511
+22
Kennet Bridge Jn
pass
1449
pass
1511¾
+22
Twyford West
pass
1451½
pass
1513½
+22
Twyford [TWY]
2
pass
1452
pass
1514½
+22
ML
Ruscombe
pass
1452½
pass
1514¾
+22
Maidenhead [MAI]
2
pass
1455½
pass
1517¾
+22
Maidenhead East
pass
1456
pass
1517¾
+22
Taplow [TAP]
2
pass
1456½
pass
1518½
+22
Burnham [BNM]
pass
1457
pass
1518¾
+21
Slough West
pass
1458
pass
1520
+21
Slough [SLO]
3
pass
1458½
pass
1520¾
+22
Dolphin Jn
pass
1459
pass
1521¼
+22
Langley [LNY]
2
pass
1459½
pass
1522¼
+22
Iver [IVR]
2
pass
1500½
pass
1523
+22
West Drayton Jcn
pass
1501
pass
1523½
+22
West Drayton [WDT]
2
pass
1501
pass
1524
+23
West Drayton East
pass
1501
pass
1524
+22
Stockley Junction
pass
1501½
pass
1524
+22
ML
ML
Heathrow Airport Jn
pass
1502
pass
1524½
+22
Hayes & Harlington [HAY]
2
pass
1502
pass
1524¾
+22
Southall West Jn
pass
1502½
pass
1525¼
+22
Southall [STL]
2
pass
1503
pass
1525¼
+22
ML
Southall East Jn
pass
1503
pass
1525½
+22
Hanwell [HAN]
1
pass
1503½
pass
1526½
+22
West Ealing Junction
pass
1504
pass
1526¾
+23
West Ealing [WEA]
pass
1504
pass
1527
+23
Ealing Broadway [EAL]
2
pass
1504
pass
1527¾
+23
Acton West
1
pass
1504½
pass
1528
+23
ML
ML
Acton Main Line [AML]
2
pass
1505½
pass
1528½
+23
Friars Jn
pass
1506
No report
Old Oak Common West
pass
1506½
pass
1529
+22
Old Oak Common East
pass
1507
pass
1529½
+22
Ladbroke Grove
pass
1508
pass
1530½
+22
UM
3
Portobello Jn (London)
1½
pass
1508½
pass
1531¼
+22
Royal Oak Junction
pass
1511
pass
1532¼
+21
London Paddington [PAD]
8
1512
1512
1534¼
+22
3
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