Part of the XR▸ project is to resignal the Slough Panel Box and Slough IECC▸ with the new ERTMS▸ (European Rail Traffic Management System) which if the theory is right will crate more paths
ERTMS the Cambrian seems to have gone very quite!
Aren't the Dutch and Belgians still having trouble on the HSL from Brussells to Amsterdamm, still no high speed services due to software incompatibilities and the inability of one manufactures transponders on the loco to talk to another's balise on the track, although they should both work to the same common standard.
There is still a lot of work to be done on ERTMS for it to be made viable for the
GWML▸ .
The other point electric train makes that if the theory is right there will be more paths. I'm not sure the theories behind ERTMS are right for very busy lines with lots of stations and junctions. There was an article in a recent Modern Railways about how much extra capacity ERTMS could provide through London Bridge which was not much due to the limitations of turning trains round at Charing Cross and Canon Street. Although it might help sorting out the junctions East of London Bridge.
Thus ERTMS may allows trains to run fster and closer together you are still limited by the number of station stops and terminal capacity. Thus it will probably work between Brussells and Amsterdamm on the HSL, but London to Reading is different kettle of fish.
TVM▸ 430 although French seems to work well as does LZB in Germany which has an added advantage it can be overlaid on existing signalling so not all trains using the line have to be equiped.