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1L23 1454 Cardiff Central to London Paddington
Departing on 5th January 2026

operated by
Great Western Railway
10 coaches
800006
800013
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 5L23 from Cardiff Central
2
1454
1454
1454¼
B
0.12
Cardiff East
pass
1455
pass
1455½
0.75
Long Dyke Jn
pass
1456½
pass
1456¾
B
UM
1.45
Moorland Road Junction
pass
1457
pass
1457¾
2.10
Pengam Jn
pass
1457½
pass
1458
2.49
Rumney River Bridge Jn
pass
1457½
pass
1458¼
6.50
Marshfield
pass
1500½
pass
1501
10.23
Ebbw Jn
pass
1503
pass
1503¾
UM
UM
10.78
Gaer Jn
pass
1503½
pass
1504¼
UM
11.60
Newport (South Wales) [NWP]
3
1506
1507
1505½
1507
1506¾
1509½
+2
UM
UM
12.14
Maindee West Jn
pass
1508
pass
1511
+3
12.36
Maindee East Jn
pass
1508½
pass
1511½
+3
ML
13.28
East Usk Jn.
pass
1509½
pass
1512½
+3
14.19
Llanwern West Jn
pass
1510½
pass
1513½
+3
19.25
Magor
pass
1514
pass
1516¼
+2
21.50
Severn Tunnel Junction [STJ]
4
pass
1515½
pass
1519
+3
UM
UT
22.60
Severn Tunnel West
pass
1516½
pass
1519¾
+3
27.08
Severn Tunnel East
pass
1520
pass
1523½
+3
28.46
Pilning [PIL]
1
1
pass
1521
pass
1524½
+3
32.12
Patchway [PWY]
1
pass
1524½
pass
1527½
+3
33.34
Bristol Parkway [BPW]
3
1526
1527
1526
1527½
1529½
1531¼
+3
UT
UB
38.02
Westerleigh Jn
pass
1531
pass
1535¾
+4
40.51
Chipping Sodbury
pass
1532½
pass
1537½
+5
45.15
Badminton
pass
1534½
pass
1540
+5
50.75
Hullavington
pass
1537½
pass
1542½
+5
55.34
Little Somerford
pass
1540
pass
1545¾
+5
62.24
Wootton Bassett Jn
1
pass
1544
pass
1549
+5
UB
UM
66.60
Rushey Platt
pass
1548
pass
1552¾
+4
UM
UR
67.73
Swindon [SWI]
3
1550
1551
1549½
1551½
1555
1556¼
+4
UR
UM
68.64
Highworth Jn
pass
1552½
pass
1558¼
+5
69.33
Swindon Stratton Green
pass
1553
pass
1558¾
+6
70.45
Swindon South Marston Jn
pass
1553½
pass
1559
+5
72.66
Bourton
pass
1554½
pass
1600¾
+6
78.57
Uffington (Oxfordshire)
pass
1558
pass
1603¾
+5
UU
81.16
Challow
pass
1559½
pass
1604¾
+5
84.74
Wantage Road
1
pass
1601
pass
1607¼
+6
88.64
Steventon
pass
1603½
pass
1608½
+5
89.77
Milton Junction
pass
1604
pass
1609¼
+5
91.41
Foxhall Jn [XJF]
pass
1605
pass
1610¼
+5
91.71
Didcot West End
pass
1605½
No report
92.06
Didcot Parkway [DID]
2
pass
1605½
pass
1611
+5
92.30
Didcot East Jn
pass
1605½
pass
1611¼
+5
93.59
Moreton Cutting
pass
1606½
pass
1611¼
+5
96.59
Cholsey [CHO]
2
pass
1607½
pass
1613
+5
100.36
Goring & Streatley [GOR]
1
2
pass
1609½
pass
1614¾
+5
ML
103.53
Pangbourne [PAN]
pass
1611½
pass
1616½
+4
106.44
Tilehurst [TLH]
2
pass
1613½
pass
1617½
+4
106.62
Tilehurst East Jn.
pass
1614
pass
1617¾
+4
108.46
Reading High Level Jn
pass
1615
pass
1619¼
+4
ML
108.79
Reading Main Line West
pass
1615½
pass
1619¾
+4
109.16
Reading [RDG]
11
1616
1618
1616½
1618½
1620¾
1622½
+4
UM
UM
109.35
Reading Main Line East
pass
1619
pass
1623
+4
110.01
Kennet Bridge Jn
pass
1619½
pass
1624
+4
113.34
Twyford West
pass
1622
pass
1626¼
+4
114.15
Twyford [TWY]
2
pass
1622½
pass
1627
+4
ML
115.51
Ruscombe
pass
1623
pass
1627½
+4
120.77
Maidenhead [MAI]
2
pass
1626
pass
1630½
+4
121.38
Maidenhead East
pass
1626½
pass
1630½
+4
122.57
Taplow [TAP]
2
pass
1627
pass
1631¼
+4
124.19
Burnham [BNM]
pass
1627½
pass
1631½
+3
126.05
Slough West
pass
1628½
pass
1632¾
+4
126.60
Slough [SLO]
3
pass
1629
pass
1633½
+4
127.78
Dolphin Jn
pass
1629½
pass
1633¾
+4
128.78
Langley [LNY]
2
pass
1630
pass
1634¾
+4
130.36
Iver [IVR]
2
pass
1631
pass
1635¾
+5
131.65
West Drayton Jcn
pass
1631½
pass
1636¼
+5
131.79
West Drayton [WDT]
2
pass
1631½
pass
1636¾
+5
132.29
West Drayton East
pass
1631½
pass
1636¾
+5
133.07
Stockley Junction
pass
1632
pass
1637
+5
ML
ML
134.02
Heathrow Airport Jn
pass
1632½
pass
1638
+5
134.25
Hayes & Harlington [HAY]
2
pass
1632½
pass
1638½
+5
135.26
Southall West Jn
pass
1633
pass
1639¼
+6
136.10
Southall [STL]
2
pass
1633½
pass
1639¼
+5
ML
136.34
Southall East Jn
pass
1633½
pass
1639¾
+6
137.68
Hanwell [HAN]
1
pass
1634
pass
1640¾
+6
138.42
West Ealing Junction
pass
1634½
pass
1641¼
+6
138.50
West Ealing [WEA]
pass
1634½
pass
1641½
+7
139.40
Ealing Broadway [EAL]
2
pass
1634½
pass
1642¼
+7
140.16
Acton West
1
pass
1635
pass
1642
+7
ML
ML
140.75
Acton Main Line [AML]
2
pass
1636
pass
1643
+7
141.43
Friars Jn
pass
1636½
No report
141.76
Old Oak Common West
pass
1637
pass
1643¾
+6
142.36
Old Oak Common East
pass
1637½
pass
1644¼
+6
143.23
Ladbroke Grove
pass
1638½
pass
1645
+6
UM
3
143.63
Portobello Jn (London)
pass
1639
pass
1645¾
+6
3
4
144.50
Royal Oak Junction
pass
1640½
pass
1646¾
+6
145.11
London Paddington [PAD]
forms 1B25 to Swansea
8
1643
1642½
1649
+6
4
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