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1L21 1350 Cardiff Central to London Paddington
Departing on 15th December 2025

operated by
Great Western Railway
9 coaches
800304
GBTT
WTT
RTTRealtime
Route
Mi.Ch
Location
Pl
Arr
Dep
Arr
Dep
Arr
Dep
Dly
Path
Line
0.00
Cardiff Central [CDF]
Pathed as Class 80x on electric at 125mph
forms from 5L21 from Cardiff Central
1
1350
1350
1353
+3
B
0.12
Cardiff East
pass
1350½
pass
1354¼
+3
0.75
Long Dyke Jn
pass
1352
pass
1355¼
+3
B
UM
1.45
Moorland Road Junction
pass
1352½
pass
1356
+3
2.10
Pengam Jn
pass
1353
pass
1356¼
+3
2.49
Rumney River Bridge Jn
pass
1353½
pass
1356½
+3
6.50
Marshfield
pass
1356½
pass
1359¼
+2
10.23
Ebbw Jn
pass
1359
pass
1401¾
+2
UM
UM
10.78
Gaer Jn
½
pass
1359½
pass
1402¼
+2
UM
11.60
Newport (South Wales) [NWP]
3
1402
1404
1402
1404½
1404½
1405¾
+1
UM
UM
12.14
Maindee West Jn
½
pass
1405½
pass
1407¼
+1
12.36
Maindee East Jn
pass
1406½
pass
1407½
+1
ML
13.28
East Usk Jn.
pass
1407½
pass
1408¼
14.19
Llanwern West Jn
pass
1408½
pass
1409¼
19.25
Magor
pass
1412
pass
1412
21.50
Severn Tunnel Junction [STJ]
4
pass
1413½
pass
1414¾
+1
UM
UT
22.60
Severn Tunnel West
pass
1414½
pass
1415½
+1
27.08
Severn Tunnel East
pass
1418
pass
1419¼
+1
28.46
Pilning [PIL]
1 ½
1
pass
1419
pass
1420½
+1
32.12
Patchway [PWY]
1
pass
1423
pass
1423½
33.34
Bristol Parkway [BPW]
3
1425
1427
1424½
1427½
1425½
1426¾
UT
UB
38.02
Westerleigh Jn
pass
1431
pass
1430¾
40.51
Chipping Sodbury
pass
1432½
pass
1432¼
45.15
Badminton
pass
1434½
pass
1434½
50.75
Hullavington
pass
1437½
pass
1437
55.34
Little Somerford
pass
1440
pass
1440
62.24
Wootton Bassett Jn
1
pass
1444
pass
1443½
UB
UM
67.73
Swindon [SWI]
3
1450
1451
1449½
1451½
1449¼
1450¾
UR
UM
68.64
Highworth Jn
pass
1452½
pass
1452¾
69.33
Swindon Stratton Green
pass
1453
pass
1453¼
70.45
Swindon South Marston Jn
pass
1453½
pass
1453¾
72.66
Bourton
pass
1454½
pass
1455
78.57
Uffington (Oxfordshire)
pass
1458
pass
1458
81.16
Challow
pass
1459½
pass
1459
84.74
Wantage Road
1
pass
1501
pass
1501½
88.64
Steventon
pass
1503½
pass
1502¾
89.77
Milton Junction
pass
1504
pass
1503½
91.41
Foxhall Jn [XJF]
pass
1505
pass
1504½
91.71
Didcot West End
pass
1505½
No report
92.06
Didcot Parkway [DID]
2
pass
1505½
pass
1505¼
92.30
Didcot East Jn
pass
1505½
pass
1505½
93.59
Moreton Cutting
pass
1506½
pass
1505½
96.59
Cholsey [CHO]
2
pass
1507½
pass
1507¼
100.36
Goring & Streatley [GOR]
1
2
pass
1509½
pass
1509
ML
103.53
Pangbourne [PAN]
pass
1511½
pass
1510¾
106.44
Tilehurst [TLH]
2
pass
1513½
pass
1511¾
-1
106.62
Tilehurst East Jn.
pass
1514
pass
1512
-1
108.46
Reading High Level Jn
pass
1515
pass
1513½
-1
ML
108.79
Reading Main Line West
pass
1515½
pass
1514¼
-1
109.16
Reading [RDG]
11
1516
1520
1516½
1520
1515¼
1519¾
UM
UM
109.35
Reading Main Line East
pass
1520½
pass
1520½
110.01
Kennet Bridge Jn
pass
1521
pass
1521¼
113.34
Twyford West
pass
1523½
pass
1523¼
114.15
Twyford [TWY]
2
pass
1524
pass
1524¼
ML
115.51
Ruscombe
pass
1524½
pass
1524½
120.77
Maidenhead [MAI]
2
pass
1527½
pass
1527½
121.38
Maidenhead East
pass
1528
pass
1527½
122.57
Taplow [TAP]
2
pass
1528½
pass
1528¼
124.19
Burnham [BNM]
pass
1529
pass
1528½
126.05
Slough West
pass
1530
pass
1529¾
126.60
Slough [SLO]
3
pass
1530½
pass
1530½
127.78
Dolphin Jn
pass
1531
pass
1530½
128.78
Langley [LNY]
2
pass
1531½
pass
1531¼
130.36
Iver [IVR]
2
pass
1532½
pass
1532
131.65
West Drayton Jcn
pass
1533
pass
1532½
131.79
West Drayton [WDT]
2
pass
1533
pass
1532¾
132.29
West Drayton East
pass
1533
pass
1532¾
133.07
Stockley Junction
pass
1533½
pass
1533
ML
ML
134.02
Heathrow Airport Jn
pass
1534
pass
1533½
134.25
Hayes & Harlington [HAY]
2
pass
1534
pass
1533¾
135.26
Southall West Jn
pass
1534½
pass
1534
136.10
Southall [STL]
2
pass
1535
pass
1534
ML
136.34
Southall East Jn
pass
1535
pass
1534¼
137.68
Hanwell [HAN]
1
pass
1535½
pass
1535¼
138.42
West Ealing Junction
pass
1536
pass
1535¾
138.50
West Ealing [WEA]
pass
1536
pass
1536
139.40
Ealing Broadway [EAL]
2
pass
1536
pass
1536½
140.16
Acton West
1
pass
1536½
pass
1536¾
ML
ML
140.75
Acton Main Line [AML]
2
pass
1537½
pass
1537¼
141.43
Friars Jn
pass
1538
No report
141.76
Old Oak Common West
pass
1538½
pass
1537¾
142.36
Old Oak Common East
pass
1539
pass
1538¼
143.23
Ladbroke Grove
pass
1540
pass
1539
UM
3
143.63
Portobello Jn (London)
1½
pass
1540½
pass
1539¾
144.50
Royal Oak Junction
pass
1543
pass
1542¼
3
2
145.11
London Paddington [PAD]
1
1544
1544
1544¼
2
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