Flyer is probably a Martin Salter initiative.
November Modern Railways has the proposed new track plan, by and large it's very impressive but there still appear to be some potential bottlenecks caused by single lead junctions and crossovers which are possibly either in the wrong place or the wrong way round.
The worst seems to be WT WS at Reading New Junction, which is West of the junction (WK) but is shown as an Up crossover from Down Main To Up Main. This means that trains from teh station to Reading New Jn have to travel to wrong line Up the Down Main from points XA and
XC▸ at Vastern Road. Whilst I realise that Reading New Jn will not be as important as now, given the new flyunder it should still be usable with the minimum disruption in times of failure/engineering work, especialy given the flyunder is single line and could possibly flood. To that end I would suggest reversing WT WS plus a new crossover linking the Down Relief to the Up Main to allow trains from platforms 14 to 12 to access Reading New Junction.
With WT WS where it is also means that any Down train crossing from the Down Relief to Down Main via points WG WH will have travel wrong line Down the Up Main for some distance. So if WT WS is reversed then a new crossover near WH will be required to link Up and Down mains.
Also platfrom 15 only seems usuable as a bi-derectional platfrom by trains off the Southern by the new flyunder, it does not seem accessible from the Down Relief from the Paddington direction.
Also not sure what the purpose of the third line is from points NC at Oxford Road junction to points NH at Cow lane. It's marked as Westburys but it appears to be accessible only from the Up line. Making parallel moves of Up and Down Westburys over Oxford Road Junction impossible.
I would have thought that wherever possible parallel moves at junctions should be the norm in any new layout even at the expense of additonal crossovers. Why build in a bottle neck when it could be avoided?
Otherwise it looks pretty good and should dramatically increase station capacity.
The French have a much larger country than us, with far fewer people in it, so building brand new railway lines around places like Reading is pretty straightforward.
As the people of Amiens found to their cost when the
LGV▸ Nord was built. At least Reading will still have a very busy station close to the edge of the Central Busines District.
As an aside has anyone worked out how many stations are directly served from Reading?