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Great Western Electrification Progress

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59CosG95

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It’s a SATS on that ABB drawing. I‘d expect a normally spaced grid feeder to be well north of Oxford, comparable to the distance Didcot to Maidenhead?
Oxford SATS, certainly. I wasn't sure if Hanboro' would get its own MPATS, separate to that ABB diagram - although, that said, the Cotswold Line would probably be fed in boosterless classic mode rather than with an AT system, given how much lower the traffic is.
 
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hwl

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Oxford SATS, certainly. I wasn't sure if Hanboro' would get its own MPATS, separate to that ABB diagram - although, that said, the Cotswold Line would probably be fed in boosterless classic mode rather than with an AT system, given how much lower the traffic is.
There is a 132kV substation at Yarnton in the V at the junction between the Banbury and Cotswolds lines.
Hence neutral section near the junction makes sense with the long term ability to feed west of there from Yarnton. Didcot should happily be able to supply up to Banbury and EWR is probably best fed from East Clayton, which would all provide sensible resilience.

Hanborough electrification would allow EMU operation of Didcot - Hanborough local shuttles and reduce issues at Oxford Station till any rebuild.
 

59CosG95

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There is a 132kV substation at Yarnton in the V at the junction between the Banbury and Cotswolds lines.
Hence neutral section near the junction makes sense with the long term ability to feed west of there from Yarnton. Didcot should happily be able to supply up to Banbury and EWR is probably best fed from East Clayton, which would all provide sensible resilience.

Hanborough electrification would allow EMU operation of Didcot - Hanborough local shuttles and reduce issues at Oxford Station till any rebuild.
And looking at the transmission lines along the line of route, there's basically nothing above local MV (33kV) supplies until Honeybourne, so a new feeder around Yarnton would be pretty sensible IMO.
 
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hwl

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And looking at the transmission lines along the line of route, there's basically nothing above local MV (33kV) supplies until Honeybourne, so a new feeder around Yarnton would be pretty sensible IMO.
Yep and Warwick /Coventry for next feed further north.
 

Mollman

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Hanborough electrification would allow EMU operation of Didcot - Hanborough local shuttles and reduce issues at Oxford Station till any rebuild.

But wasn't one of the excuses for not electrifying to Oxford that there was no point in doing it until the area re-modelling was approved?
 

59CosG95

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But wasn't one of the excuses for not electrifying to Oxford that there was no point in doing it until the area re-modelling was approved?
The remodelling of the pointwork in the station area is done, true enough. But scope's now gathering to increase the no. of tracks between Didcot and Oxford, and the project to rebuild the station itself (rather than the track layout) is still waiting in the wings.
 

WAO

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I'm glad to see that wiring to the North of Wolvercote Jn is accepted, allowing Bi-modes to accelerate from Oxford (and the Jn) while drawing power from the OLE, rather than adding to the City's diesel PM2.5's. The Hanborough straight is probably a convenient change-over point. While the intermediate stations between Oxford and Didcot are not that busy, Oxford traffic is heavy and GWR is in competition with Chiltern.

Provided the track position is finalised the OLE masts/stanchions can be rated and sited for any expansion, including dualling North of Wolvercote. The Didcot ATFS should be able to feed a good 25 miles, twice that of a classic FS and loads North of Oxford would be light.

We could certainly do with some non-Covid, good news.

WAO
 

Class 170101

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According to a post on another forum the Great Western & Wales Programme Board (Network Rail?) have approved wiring Acton West-Acton Wells and Didcot-Oxford-Hanborough, and it's waiting for the government to sign off the funding...

Can anyone confirm?

I thought Acton West to Acton Wells (and indeed onwards to Willesden No.7 Junction) was previously authorised as it even made some Section 7 Rules Possessions a few years back?

If this is indeed the case, and it jumps through the various hoops A-OK, that's fantastic news. But why Hanborough specifically? Is there a long-term plan to redouble the track from Wolvercot Jn to there? (Edit: I've found a plan to do just that, seen below - taken from North Cotswold Line Transformation Strategic Business Case)

Is it a convenient point to install a Neutral Section?

Hanborough is a useful place to send trains that would otherwise terminate at Oxford, clearing the platforms at Oxford.

could there be a suitable grid feed point in the area? The cost of wiring to a turnback point (Hanborough) might be more cost effective compared to installing an "extension lead".

I suggest both and of course helps with the old Electric Spine concept too

There is a 132kV substation at Yarnton in the V at the junction between the Banbury and Cotswolds lines.
Hence neutral section near the junction makes sense with the long term ability to feed west of there from Yarnton. Didcot should happily be able to supply up to Banbury and EWR is probably best fed from East Clayton, which would all provide sensible resilience.

Hanborough electrification would allow EMU operation of Didcot - Hanborough local shuttles and reduce issues at Oxford Station till any rebuild.

For all these comments about Hanborough being wired to relieve pressure on Oxfiord surely wiring north to Banbury could also relieve pressure on Oxford, not change the feeder station location (Yarnton) and be of more value than going to Hanborough especially as reference is made above to Warwick and Coventry (route of Electric Spine)?
 

JamesT

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For all these comments about Hanborough being wired to relieve pressure on Oxfiord surely wiring north to Banbury could also relieve pressure on Oxford, not change the feeder station location (Yarnton) and be of more value than going to Hanborough especially as reference is made above to Warwick and Coventry (route of Electric Spine)?

There is considerably more traffic on the line to Banbury than the Cotswold line. So if you want somewhere with capacity to extend a stopper to then Hanborough makes more sense as a short term option. Eventually you would wire to Banbury then you can use EMUs instead of the current Oxford - Banbury Turbo stopper, but that’s rather more than a little extra on Didcot-Oxford electrification.
 

Class 170101

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There is considerably more traffic on the line to Banbury than the Cotswold line. So if you want somewhere with capacity to extend a stopper to then Hanborough makes more sense as a short term option. Eventually you would wire to Banbury then you can use EMUs instead of the current Oxford - Banbury Turbo stopper, but that’s rather more than a little extra on Didcot-Oxford electrification.

But more traffic / trains towards Banbury would make this route more economically viable to wire than the route towards Hanborough and the Cotswolds surely?
 

edwin_m

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The people who are proposing this are probably also thinking of the decarbonization strategy and looking ahead. Much easier to do the three routes going northwards separately if the junctions have already been wired.
 

takno

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But more traffic / trains towards Banbury would make this route more economically viable to wire than the route towards Hanborough and the Cotswolds surely?
Banbury is a fair distance with more double track, and until XC announce some radical plans then most of the trains along it won't be able to take advantage of the wires. The Cotswold line is a pretty cheap, relatively short add-on on a line that already runs bi-modes with a lot of stop-start working which would benefit from electricity. There's also an existing and clearly identified need for more capacity at the south end of it.
 

Bald Rick

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Banbury is a fair distance with more double track, and until XC announce some radical plans then most of the trains along it won't be able to take advantage of the wires. The Cotswold line is a pretty cheap, relatively short add-on on a line that already runs bi-modes with a lot of stop-start working which would benefit from electricity. There's also an existing and clearly identified need for more capacity at the south end of it.

Is the right answer.
 

nlogax

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This is an encouraging bit of news. Does it constitute an official (late) phase of the GWML electrification, the start of some sort of rolling program, or just a standalone low hanging fruit-style infill opportunity?
 

Bald Rick

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This is an encouraging bit of news. Does it constitute an official (late) phase of the GWML electrification, the start of some sort of rolling program, or just a standalone low hanging fruit-style infill opportunity?

Start of something new.
 

MikePJ

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Apologies if this has been mentioned already, but some years ago plans were drawn up to increase train frequencies at Hanborough by extending some Oxford terminators. It probably wasn’t a coincidence that this was in the constituency of the then Prime Minister!

Witney Gazette article from 2014
ELECTRIC trains could be running on the Cotswold Line as far as Hanborough or Charlbury early in the next decade, if Network Rail adopts ideas in a new strategy document.

This could allow more trains to serve the eastern end of the line by extending services which would otherwise terminate at Oxford.
 
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WAO

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I imagine that locals to Hanborough would require dualling and a turnback facility, with quite a lot of signalling.

WAO
 

Bald Rick

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I imagine that locals to Hanborough would require dualling and a turnback facility, with quite a lot of signalling.

WAO

Not necessarily. If the local can follow hard on the heels of a Moreton / Worcester bound service, it can spin at Hanborough quickly and be back towards Oxford well before an up train. It would need some signalling to shorten headways on the section, but nothing too dramatic.
 

WAO

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Re-doubling North of Wolvercote Jn could be of greater benefit in that delayed Cotswold trains could wait North of the Jn without blocking the single track or the busier environs of Oxford.

I don't understand why this wasn't a feature of the previous work in 2008 - 2011; it would be expensive now, though.

WAO
 

coppercapped

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Re-doubling North of Wolvercote Jn could be of greater benefit in that delayed Cotswold trains could wait North of the Jn without blocking the single track or the busier environs of Oxford.

I don't understand why this wasn't a feature of the previous work in 2008 - 2011; it would be expensive now, though.

WAO
At the time the previous work was being carried out the (nearly) the same question was asked - why wasn't Wolvercote Junction relaid for parallel moves and the dual tracking extended towards Honeybourne.

The answer at the time was that the budget didn't stretch for it to be done as it would have been very expensive to modify the relay interlocking for the junction. The Oxford re-signalling was already being planned and the life of the changes would have been, in railway terms, short. It was said then that changes to Wolvercote would be easier when the whole area had been resignalled.

Whether this is still true, I have no way of knowing.
 

edwin_m

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It was said then that changes to Wolvercote would be easier when the whole area had been resignalled.

Whether this is still true, I have no way of knowing.
It probably is, as new signaling is generally easier to modify than old signaling (especially relay-based of the vintage that was in use at Oxford).
I don't understand why this wasn't a feature of the previous work in 2008 - 2011; it would be expensive now, though.
I think you've kinda answered your own question there... As I noted above new signaling is easier to modify and reduces the need to change everything at the same time as used to be the case.
 

takno

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At the time the previous work was being carried out the (nearly) the same question was asked - why wasn't Wolvercote Junction relaid for parallel moves and the dual tracking extended towards Honeybourne.

The answer at the time was that the budget didn't stretch for it to be done as it would have been very expensive to modify the relay interlocking for the junction. The Oxford re-signalling was already being planned and the life of the changes would have been, in railway terms, short. It was said then that changes to Wolvercote would be easier when the whole area had been resignalled.

Whether this is still true, I have no way of knowing.
There are now two down tracks most of the way from Oxford to Wolvercote Junction anyway, so a Cotswold line train can wait well clear of the station and yards now.
 

jimm

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For all these comments about Hanborough being wired to relieve pressure on Oxfiord surely wiring north to Banbury could also relieve pressure on Oxford, not change the feeder station location (Yarnton) and be of more value than going to Hanborough especially as reference is made above to Warwick and Coventry (route of Electric Spine)?

The choice of Hanborough as one of the rail 'hubs' in the Oxfordshire Rail Corridor Rail Study (just Google this for more details of the full package) is not an accident - the ever-growing town of Witney is a short drive away to the west, in the other direction Woodstock is also growing, as is Eynsham to the south and the village of Hanborough itself (including all the new homes going up just just of the station, with land set aside here to create extra station car parking in the future). The city and county councils are desperate to keep cars out of Oxford, so a frequent train service between Hanborough, the city centre and on to Cowley or Didcot is seen as a key way to achieve that aim and also handle custom from south of Oxford as well, where Culham has been identified as a key development location - not least because of the existence of the station there.

Oxford-Banbury already has frequent trains - what it needs is frequent high-capacity trains, but that's another story/thread.

Apologies if this has been mentioned already, but some years ago plans were drawn up to increase train frequencies at Hanborough by extending some Oxford terminators. It probably wasn’t a coincidence that this was in the constituency of the then Prime Minister!

Witney Gazette article from 2014

Had nothing to do with the identity of the then MP and everything to do with the local transport needs I note above, which was one of the reasons FGW and the county council had worked together to provide an extra 190 parking spaces at Hanborough in 2013. Prior to that there were just 50 spaces available in the old station yard.

I imagine that locals to Hanborough would require dualling and a turnback facility, with quite a lot of signalling.

WAO
Not necessarily. If the local can follow hard on the heels of a Moreton / Worcester bound service, it can spin at Hanborough quickly and be back towards Oxford well before an up train. It would need some signalling to shorten headways on the section, but nothing too dramatic.

Redoubling and turnback facilities are key components of the the project. Trying to do it with the single track is simply not viable, due to the performance risks if the long-distance trains are disrupted for some reason.

At the time the previous work was being carried out the (nearly) the same question was asked - why wasn't Wolvercote Junction relaid for parallel moves and the dual tracking extended towards Honeybourne.

The answer at the time was that the budget didn't stretch for it to be done as it would have been very expensive to modify the relay interlocking for the junction. The Oxford re-signalling was already being planned and the life of the changes would have been, in railway terms, short. It was said then that changes to Wolvercote would be easier when the whole area had been resignalled.

Whether this is still true, I have no way of knowing.

It wasn't budget constraints, it was simply down to the poor state of the interlocking at Oxford. Network Rail wasn't willing to take the risk that they could do the work required to enable control of additional signalling and points at Wolvercote (or anywhere else around Oxford for that matter) without the entire interlocking suffering a terminal failure, so they left it alone. The interim reversible line for Bicester-bound trains from the old platform 3, so they didn't need to weave across the main lines twice, was only provided by repurposing an existing signal.

Where the budget did affect signalling arrangements for the redoubling project was the retention of the three signal boxes along the Cotswold Line, which were initially intended to be replaced by a desk at the Didcot signalling centre.
 
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WAO

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Redoubling and turnback facilities are key components of the the project. Trying to do it with the single track is simply not viable, due to the performance risks if the long-distance trains are disrupted for some reason.

....and it's only another five miles on to Charlbury Jn, to eliminate single line working at the South end of the Cotswold line. Charlbury Station is actually slightly busier than Hanborough and has two platforms already.

Let's hope NR's improved project management makes the scheme(s) affordable.

WAO
 

FGW_DID

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In recent times (2018/2019?) the still extant, but heavily overtaken by nature, second platform at Hanborough was partially cleared of vegetation. There was, if I recall rightly, a notice from the Cotswolds Line Group on the station notice board about the work, something to do with checking the integrity of the current structure for use in future plans, something like that anyway!
 

Brissle Girl

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....and it's only another five miles on to Charlbury Jn, to eliminate single line working at the South end of the Cotswold line. Charlbury Station is actually slightly busier than Hanborough and has two platforms already.

Let's hope NR's improved project management makes the scheme(s) affordable.

WAO
It's never too long before scope creep is being proposed. That's over twice the distance from Wolvercote Jn, so would presumably double the cost of the project. And if that's not want the customer (OCC) is looking for, why would it be done?
 

fishwomp

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It's never too long before scope creep is being proposed. That's over twice the distance from Wolvercote Jn, so would presumably double the cost of the project. And if that's not want the customer (OCC) is looking for, why would it be done?

This would also increase the need for rolling stock - extra 9 minutes each direction has to come from somewhere. Also would need to double or close Finstock and Combe stations!
 
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