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1L20 1127 Carmarthen to London Paddington
Departing on 18th December 2025

operated by
Great Western Railway
5 coaches
Carmarthen - Swansea
800005
10 coaches
Swansea - London Paddington
800005
800031
GBTT
WTT
RTTRealtime
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
1128
-1
UU
Ferryside [FYS]
pass
1137½
No report
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
1151
1152
+4
Llanelli [LLE]
2
1154
1155
1154
1155½
1157¾
1158¾
+3
Llandeilo Jn
pass
1158
pass
1201
+3
Duffryn West
pass
1158½
pass
1201¼
+2
Gowerton [GWN]
2
pass
1202
pass
1204
+2
Cockett West
1
pass
1203½
pass
1205¾
+2
Swansea Loop West
1
pass
1207½
pass
1217
+9
Swansea Loop East
pass
1210½
pass
1220½
+10
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
1223¼
1227¼
+5
USM
USM
Swansea Loop East
pass
1223½
pass
1229
+5
Landore Junction
pass
1224½
pass
1230¼
+5
USM
UM
Llansamlet [LAS]
2
pass
1227½
pass
1233
+5
Skewen [SKE]
2
pass
1229½
pass
1235
+5
Neath [NTH]
2
1233
1234
1232½
1234
1237½
1238¾
+4
Briton Ferry West Jn
pass
1236½
pass
1241½
+5
Port Talbot Parkway [PTA]
2
1240
1241
1240
1241½
1245¼
1246¼
+4
Port Talbot East
pass
1242½
No report
Margam Middle Jn
pass
1243½
pass
1247¾
+4
Margam East Jn
pass
1244½
pass
1249¼
+4
Margam Moors Jn.
pass
1245½
pass
1250¾
+5
UM
Pyle [PYL]
2
pass
1247
pass
1252¼
+5
Stormy
pass
1248½
pass
1254¼
+5
At platform
Bridgend [BGN]
2
1253
1254
1252½
1254
1258
1259¾
+5
UM
UM
Tremains
pass
1255
pass
1302
+6
Pencoed Up Passenger Loop
pass
1257½
No report
Pencoed [PCD]
2
pass
1258
pass
1307¼
+9
Llanharan [LLR]
1
pass
1300
pass
1311¼
+11
Llantrisant [LTI]
pass
1301½
No report
Pontyclun [PYC]
1
2
pass
1302
pass
1313½
+11
Miskin
pass
1304
pass
1315½
+11
St Fagans L C
pass
1308½
pass
1319¼
+10
Leckwith North Jn
½
pass
1311
pass
1321½
+10
UM
C
Cardiff West
pass
1313½
No report
Cardiff Central [CDF]
Pathed as Class 80x on electric from here
2
1314
1318
1315
1318
1324½
1330¼
+12
C
B
Cardiff East
pass
1318½
pass
1331½
+12
Long Dyke Jn
pass
1320
pass
1332½
+12
B
UM
Moorland Road Junction
pass
1320½
pass
1333¼
+13
Pengam Jn
pass
1321
pass
1333½
+12
Rumney River Bridge Jn
pass
1321
pass
1334
+12
Marshfield
pass
1324
pass
1336½
+12
Ebbw Jn
pass
1326½
pass
1339¼
+12
UM
UM
Gaer Jn
pass
1327
pass
1339½
+12
UM
Newport (South Wales) [NWP]
4
1329
1331
1329
1331
1341¼
1342¾
+11
UM
UM
Maindee West Jn
pass
1332
pass
1344¼
+12
Maindee East Jn
pass
1332½
pass
1344¾
+12
ML
East Usk Jn.
pass
1333½
pass
1345¾
+12
Llanwern West Jn
½
pass
1334½
pass
1346¾
+12
Magor
pass
1338½
pass
1349½
+11
Severn Tunnel Junction [STJ]
4
pass
1340
pass
1352¼
+12
UM
UT
Severn Tunnel West
pass
1341
pass
1353
+12
Severn Tunnel East
½
pass
1344½
pass
1356½
+12
Pilning [PIL]
1
1
pass
1346
pass
1357½
+11
Patchway [PWY]
1
pass
1349½
pass
1400¼
+10
Bristol Parkway [BPW]
3
1352
1355
1352
1356
1402
1404½
+8
UT
UB
Westerleigh Jn
pass
1400
pass
1408½
+8
Chipping Sodbury
pass
1401½
pass
1410¼
+8
Badminton
pass
1403½
pass
1412½
+8
Hullavington
pass
1406½
pass
1415
+8
Little Somerford
pass
1409
pass
1418
+8
Wootton Bassett Jn
1
pass
1413
pass
1421
+8
UB
UM
Swindon [SWI]
1
1419
1420
1418½
1420½
1427
1428¼
+7
UR
UM
Highworth Jn
pass
1421½
pass
1430¼
+8
Swindon Stratton Green
pass
1422
pass
1430¾
+9
Swindon South Marston Jn
pass
1422½
pass
1431
+8
Bourton
pass
1423½
pass
1432½
+8
Uffington (Oxfordshire)
pass
1427
pass
1435¼
+8
Challow
pass
1428½
pass
1436½
+8
Wantage Road
1
pass
1430
pass
1438¾
+8
Steventon
pass
1432½
pass
1440
+7
Milton Junction
pass
1433
pass
1441
+7
Foxhall Jn [XJF]
pass
1434
pass
1441¾
+7
Didcot West End
pass
1434½
No report
Didcot Parkway [DID]
2
pass
1434½
pass
1442½
+8
Didcot East Jn
pass
1434½
pass
1442¾
+8
Moreton Cutting
pass
1435½
pass
1443
+7
Cholsey [CHO]
2
pass
1436½
pass
1444½
+7
Goring & Streatley [GOR]
1
2
pass
1438½
pass
1446¼
+7
ML
Pangbourne [PAN]
pass
1440½
pass
1448
+7
Tilehurst [TLH]
2
pass
1442½
pass
1449¼
+6
Tilehurst East Jn.
pass
1443
pass
1449½
+6
Reading High Level Jn
pass
1444
pass
1451
+7
ML
Reading Main Line West
pass
1444½
pass
1451½
+7
Reading [RDG]
10
1445
1448
1445½
1448
1452¼
1454¼
+6
UM
UM
Reading Main Line East
pass
1448½
pass
1455
+6
Kennet Bridge Jn
pass
1449
pass
1455½
+6
Twyford West
pass
1451½
pass
1457½
+6
Twyford [TWY]
2
pass
1452
pass
1458½
+6
ML
Ruscombe
pass
1452½
pass
1458¾
+6
Maidenhead [MAI]
2
pass
1455½
pass
1501¾
+6
Maidenhead East
pass
1456
pass
1501¾
+6
Taplow [TAP]
2
pass
1456½
pass
1502½
+6
Burnham [BNM]
pass
1457
pass
1502¾
+5
Slough West
pass
1458
pass
1503¾
+5
Slough [SLO]
3
pass
1458½
pass
1504½
+6
Dolphin Jn
pass
1459
pass
1504¾
+5
Langley [LNY]
2
pass
1459½
pass
1505½
+6
Iver [IVR]
2
pass
1500½
pass
1506¼
+6
West Drayton Jcn
pass
1501
pass
1506½
+5
West Drayton [WDT]
2
pass
1501
pass
1507
+6
West Drayton East
pass
1501
pass
1507
+6
Stockley Junction
pass
1501½
pass
1507½
+6
ML
ML
Heathrow Airport Jn
pass
1502
pass
1509½
+7
Hayes & Harlington [HAY]
2
pass
1502
pass
1510¼
+8
Southall West Jn
pass
1502½
pass
1511¼
+8
Southall [STL]
2
pass
1503
pass
1511¾
+8
ML
Southall East Jn
pass
1503
pass
1512
+9
Hanwell [HAN]
1
pass
1503½
pass
1513¼
+9
West Ealing Junction
pass
1504
pass
1513¾
+9
West Ealing [WEA]
pass
1504
pass
1514
+10
Ealing Broadway [EAL]
2
pass
1504
pass
1514¾
+10
Acton West
1
pass
1504½
pass
1514¾
+10
ML
ML
Acton Main Line [AML]
2
pass
1505½
pass
1515½
+10
Friars Jn
pass
1506
No report
Old Oak Common West
pass
1506½
pass
1516½
+10
Old Oak Common East
pass
1507
pass
1517
+10
Ladbroke Grove
pass
1508
pass
1518
+10
UM
3
Portobello Jn (London)
1½
pass
1508½
pass
1518½
+10
Royal Oak Junction
pass
1511
pass
1519½
+8
London Paddington [PAD]
8
1512
1512
1521¼
+9
3
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