It would suggest one power car shut down but I understood if that was the case the train wouldn't be allowed past Newton Abbot.
Would it really be that simple?
In the Western Route Sectional Appendix, Module WR1, it has the following (only parts about the
GW» main line quoted):
1. Lines over which assistance must always be provided...
(none on the main line)2. Lines over which assistance must be provided under certain conditions^ Newton Abbot to Plymouth
^ Plymouth to Newton Abbot (train may proceed as far as Tavistock Jn if this would facilitate assistance)
^ Paignton to Newton Abbot
^ Par to St Austell
...
If any of the following circumstances apply in respect of the above sections, assistance must be provided:
13. the train comprises more than 8 trailer vehicles.
14. rail head conditions in the area concerned are reported as poor, for example during falling snow, severe
frost, drizzle or period of leaf fall.
15. other technical problems exist with the train, to which the Driver or the train operator^s Fleet Controller will draw attention.
16. signalling equipment failures or temporary/ emergency speed restrictions exist in the section preventing an unchecked run being made.
3. Authority to proceed unassisted over the lines listed in 2. above.For trains comprising not more than 8 trailer vehicles, an ^
HST▸ Authority to Proceed Unassisted^ form (reproduced at
the end of this Instruction) may be issued provided that none of the circumstances listed in clause 2 exist and that the
following arrangements are made:
a) Operations Control must obtain the permission of the appropriate train operator^s Fleet Controller.
b) Operations Control must ascertain that local weather conditions are suitable, and arrange (as far as is practicable)
with the controlling Signaller for a ^clear run^ to be provided as indicated below:
| From | To | Remarks |
| Signal E90 (West of Newton Abbot) | Signal E94 (West of Dainton) | -- |
| Signal E94 (West of Dainton) | Signal DM227 (Marley
Tunnel) | Applicable only to trains formed
with 8 trailer vehicles. Train must
not stop at Totnes or be routed via
the Down Platform Line thereat. |
| Signal E98/E198 (Totnes) | Signal DM227 (Marley
Tunnel) | Applies to trains formed with 7
trailer vehicles or less. |
| Signal E3/E203 (Totnes) | Signal E7 (East of Dainton) | -- |
| Plymouth Station | Signal UM235 (Ivybridge) | -- |
| Par | St Austell | -- |
Then there's some stuff about the form and what if it stops in section.
