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1B15 0859 Reading to Swansea
Departing on 4th January 2026

operated by
Great Western Railway
10 coaches
800028
800001
GBTT
WTT
RTTRealtime
Route
Mi.Ch
Location
Pl
Arr
Dep
Arr
Dep
Arr
Dep
Dly
Path
Line
0.00
Reading [RDG]
Pathed as Class 80x on electric at 125mph
12
0859
0859
0859
0.17
Reading Main Line West
pass
0859½
pass
0859¾
1.20
Reading West Jn
pass
0900½
pass
0901¼
RL
1.60
Scours Lane Jn
pass
0901
pass
0901¾
+1
2.34
Tilehurst East Jn.
pass
0901
pass
0902½
+1
2.52
Tilehurst [TLH]
3
pass
0901½
pass
0902½
+1
5.43
Pangbourne [PAN]
1
pass
0903
pass
0904¼
+1
8.60
Goring & Streatley [GOR]
3
pass
0905
pass
0906½
+1
RL
12.37
Cholsey [CHO]
3
pass
0908
pass
0908½
15.37
Moreton Cutting
pass
0910
pass
0910½
16.66
Didcot East Jn
1
pass
0911
pass
0912¼
+1
17.10
Didcot Parkway [DID]
3
0913
0914
0913
0914½
0913¼
0916¼
+1
DR
RL
17.25
Didcot West End
pass
0915
No report
17.55
Foxhall Jn [XJF]
pass
0915½
pass
0917¾
+2
RL
19.19
Milton Junction
pass
0916½
pass
0919½
+3
RL
DM
20.32
Steventon
pass
0917
pass
0921¼
+4
24.22
Wantage Road
pass
0919
pass
0925½
+6
28.00
Challow
pass
0921
pass
0928¼
+7
30.39
Uffington (Oxfordshire)
1
pass
0922
pass
0929½
+7
36.30
Bourton
pass
0926
pass
0932¼
+6
38.51
Swindon South Marston Jn
pass
0927½
pass
0933½
+5
39.63
Swindon Stratton Green
pass
0928½
pass
0934¼
+6
40.32
Highworth Jn
pass
0929
pass
0934¾
+5
40.64
Swindon East Loop
pass
0929
pass
0936
+6
41.23
Swindon [SWI]
3
0929
0932
0930
0932
0937¾
0939½
+7
DM
DM
42.36
Rushey Platt
pass
0933½
pass
0942¼
+9
46.72
Wootton Bassett Jn
pass
0937
pass
0945¾
+8
DM
DB
53.62
Little Somerford
pass
0941
pass
0950
+9
58.21
Hullavington
1
pass
0943½
pass
0952½
+9
64.01
Badminton
pass
0947
pass
0955
+8
68.45
Chipping Sodbury
pass
0949½
pass
0957¾
+8
71.14
Westerleigh Jn
pass
0951
pass
0959½
+8
75.62
Bristol Parkway [BPW]
2
0954
0956
0954
0956
1003½
1005½
+9
DB
DT
77.04
Patchway [PWY]
2
pass
0957½
pass
1007¼
+9
80.50
Pilning [PIL]
2
pass
1000
pass
1010
+10
82.08
Severn Tunnel East
pass
1001
pass
1011
+10
86.36
Severn Tunnel West
pass
1004½
pass
1014
+9
87.46
Severn Tunnel Junction [STJ]
3
pass
1005½
pass
1015½
+10
DT
DM
89.71
Magor
pass
1007
pass
1017
+10
94.77
Llanwern West Jn
pass
1010½
pass
1020½
+10
95.68
East Usk Jn.
pass
1011
pass
1021
+10
96.60
Maindee East Jn
pass
1012
pass
1022
+10
ML
97.02
Maindee West Jn
½
pass
1012½
pass
1022¾
+10
97.36
Newport (South Wales) [NWP]
2
1014
1015
1014
1015½
1024
1025¼
+9
DM
DM
98.18
Gaer Jn
pass
1017
pass
1027¼
+10
DM
98.73
Ebbw Jn
pass
1018
pass
1028¼
+10
DM
DM
102.46
Marshfield
1 ½
pass
1021
pass
1031
+10
106.47
Rumney River Bridge Jn
pass
1025
pass
1033½
+8
107.06
Pengam Jn
pass
1025½
pass
1034
+8
107.51
Moorland Road Junction
pass
1026
pass
1034½
+8
108.21
Long Dyke Jn
1
pass
1026½
pass
1035½
+9
C
109.04
Cardiff East
pass
1029
pass
1036¾
+7
DM
E
109.16
Cardiff Central [CDF]
Pathed as Class 80x on diesel from here
3
1030
1032
1030
1032
1038¼
1040
+8
E
D
109.42
Cardiff West
pass
1033
No report
110.41
Leckwith North Jn
pass
1035
pass
1043
+8
D
DM
113.19
St Fagans L C
pass
1037
pass
1045¼
+8
118.13
Miskin
pass
1041
pass
1049¼
+8
120.26
Pontyclun [PYC]
1
pass
1043
pass
1051
+8
120.62
Llantrisant [LTI]
pass
1043½
No report
122.58
Llanharan [LLR]
2
pass
1045
pass
1053
+8
125.46
Pencoed [PCD]
1
pass
1047
pass
1055
+8
128.47
Tremains
pass
1049½
pass
1057
+7
129.31
Bridgend [BGN]
1
1051
1052
1050½
1052
1058½
1059¾
+7
DM
DM
133.51
Stormy
pass
1056½
pass
1104¾
+8
135.26
Pyle [PYL]
1
pass
1057½
pass
1106
+8
137.50
Margam Moors Jn.
pass
1059
pass
1107
+8
DM
139.17
Margam East Jn
pass
1100
pass
1108¼
+8
140.05
Margam Middle Jn
pass
1100½
pass
1108½
+7
140.75
Port Talbot East
pass
1101½
No report
141.44
Port Talbot Parkway [PTA]
1
1103
1104
1102½
1104
1110½
1112¼
+8
143.43
Baglan [BAJ]
1
pass
1106
pass
1115¼
+9
144.14
Briton Ferry East
pass
1107
pass
1115½
+8
145.25
Briton Ferry [BNF]
1
pass
1108
pass
1116¾
+9
145.43
Court Sart Jn
pass
1108
pass
1116¾
+8
147.05
Neath [NTH]
1 3
1
1110
1111
1110
1111½
1118½
1119¾
+8
149.11
Skewen [SKE]
1
pass
1115½
pass
1122¾
+7
150.73
Llansamlet [LAS]
1
pass
1118½
pass
1124¾
+6
153.47
Landore Junction
pass
1122½
pass
1127½
+4
DM
DSM
154.28
Swansea Loop East
pass
1124
pass
1128¾
+4
154.72
Swansea [SWA]
joins with 1L60 towards London Paddington and forms 5B15 to Swansea Maliphant Iep Dpt
2
1126
1126
1131
+5
DSM
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