We've not been keeping this summary up to date - very remiss, sorry about that.
In fact, during 2014 the layout has changed little. The platforms and fittings being worked on a year ago have all been finished, and are now in use, while the viaduct and the earthworks on the "triangle" for the new Feeder Lines have been constructed. Not long before Christmas some of the track between P7/8 and the viaduct was removed, and new track put in the space that was cleared. Finally, during the blockade across the new year the rest of the new trackwork between the station and the viaduct was put in place.
That gives the following new features:
- P3 is now in use, for turning Cross-country services. These also use P7 & P8.
- The viaduct only provides grade separation with the West Curve, as the Festival Line and Feeder Lines that will also pass under it will not be finished until Easter.
- That means that, until Easter, up trains from the Westbury Lines can use P7/8 only.
- There is a small part of the Festival Line in use, but it is in effect just a third running line down the eastern ramp of the viaduct.
From Now until Easter 2015 (apart from lots of minor fettling tasks):
- The now disused Main Lines will be lifted, the old Cow Lane bridge demolished, and the ground regraded for the Feeder Lines.
- The two feeder lines will be laid down the slope beside the eastern ramp and under the viaduct to join the track across the triangle.
- The relief lines further west will be shifted southwards, and the junction with the West Curve renewed.
- The space cleared here will take a new extended loop and access track for the depot.
Then at Easter all the new bits go live. The timetable will not use the extra capacity at once, and possibly not much until the big timetable upheaval when Crossrail starts in 2019. But before that there is a whole load of electric knitting to do.