It would be pointless have a service that would run entirely under the wires from Edinburgh to Exeter though and require it to cart around diesel engines just for the last 50 miles of its journey. If the wires end at Exeter it would be a much better idea to end the Cross Country network at Exeter with passengers changing there for services to Plymouth. This is not likely to be popular though so unless you are going to electrify all the way to Plymouth then you may as well end the wires at Bristol as that's where the core part of the network ends with half of the services from Birmingham terminating there. As far as I know the DfT do not have any plans to electrify to Exeter so I don't think it's the case that they consider Plymouth to be a bridge too far at all. It should be noted that the direct road from Exeter to London (the A30(T)/A303(T)) is not considered to be of strategic national importance and plans to improve all of it to dual carriageway were abandoned a few years back so it's not just Plymouth that is missing out. The reason the strategic transport network ends at Exeter is that's where the M5 ends. Traffic levels to Plymouth do not justify a motorway, the A38(T) is never that busy as quite a bit of traffic leaves the road in the area for Exeter, Cornwall and the Torbay/Newton Abbot area.Zoe some would say you could still terminate the wires at Exeter and run Bi -mode Voyagers and HSTs beyond and then use say cascaded Bi-mode Meridians to replace the HSTs when Midlands main line is wired I suppose or you could simply wire up to Plymouth eventually but that option seems to be a bridge too far with the DFt at the moment.After all the Dfts South West radar effectively ends at Exeter which incidentally is the official limit of the Governments National strategic Transport Networks,ie regarded as essential to the countries economic wellbeing and therefore justifying major investment. Still it could be worse if passengers were met with the announcement on arrival at Exeter "This is Exeter,all change ,all change for connecting services to Plymouth and Penzance".
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