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1B21 1435 London Paddington to Swansea
Departing on 17th January 2026

operated by
Great Western Railway
GBTT
WTT
Route
Location
Pl
Arr
Dep
Arr
Dep
Path
Line
London Paddington [PAD]
8
1435
1435
3
Royal Oak Junction
pass
1436
2
Portobello Jn (London)
pass
1437½
2
Ladbroke Grove
pass
1438
2
ML
Acton West
pass
1440½
ML
ML
Southall [STL]
1
pass
1442½
ML
Heathrow Airport Jn
pass
1443½
ML
Slough [SLO]
2
pass
1447
ML
Maidenhead [MAI]
1
pass
1450
ML
Twyford [TWY]
1
1
pass
1453½
ML
Kennet Bridge Jn
pass
1456½
DML
Reading [RDG]
7
1458
1501
1458
1501
WL
Oxford Road Jn
1
pass
1503
Southcote Jn
½
pass
1505
Theale [THE]
1
pass
1508½
Newbury [NBY]
1½
Pathed as Class 80x on diesel from here
pass
1516½
Bedwyn [BDW]
1
pass
1527
Pewsey [PEW]
1½
pass
1533½
Woodborough
½
pass
1537½
Lavington
1 5
pass
1542½
Heywood Road Jn
pass
1553
Hawkeridge Jn
pass
1555½
Bradford Jn
1
pass
1602½
Bathampton Jn
1½
pass
1614½
Bath Spa [BTH]
1 2
1
1620
1621
1619½
1621½
North Somerset Jn
pass
1633
DM
Bristol East Jn
pass
1633½
Bristol Temple Meads [BRI]
Service reverses here
15
1635
1647
1635
1647
DF
Bristol East Jn
pass
1648
UF
Dr Day's Jn
pass
1649
ML
Horfield Junction
pass
1652
Filton Abbey Wood [FIT]
1
2
pass
1653
DF
Bristol Parkway [BPW]
Pathed as Class 80x on electric from here
Service reverses here
2
1657
1704
1656½
1704½
Patchway [PWY]
2
pass
1706
Pilning [PIL]
2
pass
1708½
Severn Tunnel East
pass
1709½
Severn Tunnel West
pass
1713
Severn Tunnel Junction [STJ]
3
pass
1714
ML
Llanwern West Jn
pass
1719
Maindee East Jn
pass
1720½
ML
Maindee West Jn
pass
1721
Newport (South Wales) [NWP]
2
1722
1724
1722
1724
DM
Gaer Jn
pass
1725½
ML
Ebbw Jn
pass
1726½
Marshfield
pass
1729
Moorland Road Junction
1
pass
1732½
RL
Long Dyke Jn
pass
1734
E
Cardiff Central [CDF]
Pathed as Class 80x on diesel from here
3
1737
1739
1736½
1739
D
Leckwith North Jn
pass
1742
Pontyclun [PYC]
pass
1750
Bridgend [BGN]
1
1758
1759
1757½
1759
Stormy
pass
1803½
Margam Moors Jn.
pass
1806
Margam East Jn
pass
1807
Port Talbot Parkway [PTA]
1
1810
1811
1809½
1811
Court Sart Jn
pass
1815
Neath [NTH]
1
1817
1818
1817
1818½
Swansea Loop East
pass
1828
Swansea [SWA]
3
1830
1830
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