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1B21 1435 London Paddington to Swansea
Departing on 10th January 2026

operated by
Great Western Railway
9 coaches
London Paddington - Bristol Temple Meads
802104
9 coaches
Bristol Temple Meads - Bristol Parkway
802104
9 coaches
Bristol Parkway - Swansea
802104
GBTT
WTT
RTTRealtime
Route
Mi.Ch
Location
Pl
Arr
Dep
Arr
Dep
Arr
Dep
Dly
Path
Line
0.00
London Paddington [PAD]
Pathed as Class 80x on electric at 125mph
9
1435
1435
1435¼
3
0.41
Royal Oak Junction
pass
1436
pass
1436½
3
2
1.28
Portobello Jn (London)
pass
1437½
pass
1437¾
1.68
Ladbroke Grove
pass
1438
pass
1438½
2
DM
2.55
Old Oak Common East
pass
1438½
pass
1439¼
3.15
Old Oak Common West
pass
1439
pass
1439¾
3.48
Friars Jn
pass
1439½
pass
1440
4.16
Acton Main Line [AML]
pass
1440
pass
1440¾
4.75
Acton West
pass
1440½
pass
1441
ML
ML
5.51
Ealing Broadway [EAL]
1
pass
1441
pass
1441½
6.41
West Ealing [WEA]
pass
1441½
pass
1442
6.49
West Ealing Junction
pass
1441½
pass
1442
7.23
Hanwell [HAN]
pass
1441½
pass
1442¼
8.57
Southall East Jn
pass
1442½
pass
1443
9.01
Southall [STL]
1
pass
1442½
pass
1443¾
+1
9.65
Southall West Jn
pass
1443
pass
1443¾
10.66
Hayes & Harlington [HAY]
1
pass
1443½
pass
1444½
+1
11.09
Heathrow Airport Jn
pass
1443½
pass
1444¼
ML
12.04
Stockley Junction
pass
1444
pass
1444¾
12.62
West Drayton East
pass
1444½
pass
1445¼
+1
13.12
West Drayton [WDT]
1
pass
1444½
pass
1445¾
+1
13.26
West Drayton Jcn
pass
1444½
pass
1445¾
+1
14.55
Iver [IVR]
1
pass
1445
pass
1446¼
+1
16.13
Langley [LNY]
1
pass
1446
pass
1447½
+1
17.13
Dolphin Jn
pass
1446½
pass
1448
+1
18.31
Slough [SLO]
2
pass
1447
pass
1448¾
+1
ML
19.06
Slough West
pass
1447½
pass
1449¼
+1
20.72
Burnham [BNM]
pass
1448½
pass
1450¼
+1
22.34
Taplow [TAP]
1
pass
1449
pass
1451
+2
23.53
Maidenhead East
pass
1449½
pass
1451¾
+2
24.14
Maidenhead [MAI]
1
pass
1450
pass
1452¼
+2
29.40
Ruscombe
pass
1453
pass
1454½
+1
30.76
Twyford [TWY]
1
1
pass
1453½
pass
1455¼
+1
ML
31.57
Twyford West
pass
1454
pass
1455¾
+1
35.10
Kennet Bridge Jn
pass
1456½
pass
1458
+1
35.56
Reading Main Line East
pass
1457
pass
1458½
+1
35.75
Reading [RDG]
7
1458
1501
1458
1501
1459¾
1502¼
+1
DM
DW
36.12
Reading Main Line West
pass
1502
pass
1503
+1
36.61
Oxford Road Jn
1½
pass
1503
pass
1504
+1
36.70
Reading West [RDW]
1
pass
1503½
pass
1503¾
37.57
Southcote Jn
pass
1505½
pass
1504¾
41.17
Theale [THE]
1
2
pass
1508½
pass
1507
-1
44.58
Aldermaston [AMT]
2
pass
1511
pass
1509½
-1
46.54
Midgham [MDG]
1
pass
1512
pass
1509¾
-2
49.40
Thatcham [THA]
1
pass
1514
pass
1512¾
-1
52.26
Newbury Racecourse [NRC]
1
pass
1516
pass
1514¼
-1
53.01
Newbury [NBY]
1½
Pathed as Class 80x on diesel from here
pass
1516½
pass
1514
-2
58.33
Kintbury [KIT]
1
pass
1521
pass
1517¾
-2
61.38
Hungerford [HGD]
2
pass
1523
pass
1520
-2
66.28
Bedwyn [BDW]
1
pass
1527
pass
1526
70.02
Savernake
pass
1529½
pass
1528¼
-1
75.21
Pewsey [PEW]
1½
1
pass
1533½
pass
1532¾
78.68
Woodborough
½
pass
1537½
pass
1536¼
-1
88.01
Lavington
1 5
pass
1542½
pass
1541½
-1
94.40
Heywood Road Jn
pass
1553
pass
1547½
-5
DW
DWL
95.27
Hawkeridge Jn
pass
1555½
pass
1550½
-4
DWL
DT
98.60
Trowbridge [TRO]
1
pass
1600½
pass
1554½
-5
100.01
Bradford Jn
1
pass
1602½
pass
1556
-6
102.04
Bradford-on-Avon [BOA]
1
pass
1605
pass
1600
-5
103.30
Avoncliff [AVF]
1
pass
1607
pass
1602¼
-4
104.23
Freshford [FFD]
1
pass
1608
pass
1603½
-4
109.18
Bathampton Jn
pass
1614½
pass
1608¾
-5
DT
DM
111.39
Bath Spa [BTH]
1 3½
1
1618
1620
1618
1620
1613
1619¾
112.40
Oldfield Park [OLF]
1
pass
1621½
pass
1621¼
113.40
Twerton
pass
1623
pass
1622¼
118.31
Keynsham [KYN]
1
pass
1628½
pass
1625
-3
122.14
North Somerset Jn
pass
1633
pass
1629
-3
122.48
Bristol East Jn
pass
1633½
pass
1634¾
+1
122.78
Bristol Temple Meads [BRI]
Service reverses here
15
1635
1647
1635
1647
1636
1646¾
DM
DF
123.28
Bristol East Jn
pass
1648
pass
1648
UM
123.52
Dr Day's Jn
pass
1649
pass
1648½
ML
124.01
Lawrence Hill [LWH]
pass
1649½
pass
1649¼
124.47
Stapleton Road [SRD]
pass
1650
pass
1650
125.00
Narroways Hill Jn
pass
1650½
pass
1650¼
126.57
Horfield Junction
pass
1652
pass
1651¾
127.27
Filton Abbey Wood [FIT]
1
2
pass
1653
pass
1652½
UFM
UD
127.47
Filton Jn
pass
1653½
No report
128.66
Bristol Parkway [BPW]
Pathed as Class 80x on electric from here
Service reverses here
2
1657
1704
1656½
1704½
1656
1704¼
DT
130.08
Patchway [PWY]
2
pass
1706
pass
1705½
133.54
Pilning [PIL]
2
pass
1708½
pass
1708½
135.12
Severn Tunnel East
pass
1709½
pass
1709¼
139.40
Severn Tunnel West
pass
1713
pass
1712½
140.50
Severn Tunnel Junction [STJ]
3
pass
1714
pass
1714
DT
DM
142.75
Magor
pass
1715½
pass
1715½
148.01
Llanwern West Jn
pass
1719
pass
1719¼
148.72
East Usk Jn.
pass
1719½
pass
1719¾
149.64
Maindee East Jn
pass
1720½
pass
1720¾
ML
150.06
Maindee West Jn
pass
1721
pass
1721½
150.40
Newport (South Wales) [NWP]
2
1722
1724
1722
1724
1722¾
1724¼
DM
DM
151.22
Gaer Jn
pass
1725½
pass
1725¾
DM
151.77
Ebbw Jn
pass
1726½
pass
1726½
DM
DM
155.50
Marshfield
pass
1729
pass
1729¼
159.51
Rumney River Bridge Jn
pass
1732
pass
1731½
160.10
Pengam Jn
pass
1732
pass
1732
160.55
Moorland Road Junction
1
pass
1732½
pass
1732¾
DM
DR
161.25
Long Dyke Jn
pass
1734
pass
1733¼
E
162.08
Cardiff East
pass
1735½
pass
1734½
-1
DR
E
162.20
Cardiff Central [CDF]
Pathed as Class 80x on diesel from here
3
1737
1739
1736½
1739
1736
1739
E
D
162.46
Cardiff West
pass
1740
No report
163.45
Leckwith North Jn
pass
1742
pass
1742
D
DM
166.23
St Fagans L C
pass
1744
pass
1744½
171.17
Miskin
pass
1748
pass
1748½
173.30
Pontyclun [PYC]
1
pass
1750
pass
1750¼
173.66
Llantrisant [LTI]
pass
1750½
No report
175.62
Llanharan [LLR]
2
pass
1752
pass
1752½
178.50
Pencoed [PCD]
1
pass
1754
pass
1755¾
+1
181.51
Tremains
pass
1756½
pass
1757¾
+1
182.35
Bridgend [BGN]
1
1758
1759
1757½
1759
1759
1801½
+2
DM
186.55
Stormy
pass
1803½
pass
1806¼
+2
188.30
Pyle [PYL]
1
pass
1804½
pass
1807½
+2
190.54
Margam Moors Jn.
pass
1806
pass
1808½
+2
DM
192.21
Margam East Jn
pass
1807
pass
1810
+3
193.09
Margam Middle Jn
pass
1807½
pass
1810
+2
193.79
Port Talbot East
pass
1808½
No report
194.48
Port Talbot Parkway [PTA]
1
1810
1811
1809½
1811
1812¼
1814¼
+3
196.47
Baglan [BAJ]
1
pass
1813
pass
1817
+3
197.18
Briton Ferry East
pass
1814
pass
1817¼
+3
198.29
Briton Ferry [BNF]
1
pass
1815
pass
1818½
+3
198.47
Court Sart Jn
pass
1815
pass
1818¼
+3
200.09
Neath [NTH]
1
1
1817
1818
1817
1818½
1820¼
1821¾
+3
202.15
Skewen [SKE]
1
pass
1821½
pass
1824¾
+3
203.77
Llansamlet [LAS]
1
pass
1824
pass
1826½
+2
206.51
Landore Junction
pass
1827
pass
1829½
+2
DM
DSM
207.32
Swansea Loop East
pass
1828
pass
1830¾
+2
207.76
Swansea [SWA]
3
1830
1830
1833
+3
DSM
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