Llandeilo to Lampeter

[Doctor Fegg]

Ok, this one crosses the boundary from "speculative" into "fruitcake".

But the AECOM 2015 report into reopening Aberystwyth–Carmarthen, at https://www.gov.wales/docs/det/report/151222-aberystwyth-carmarthen-report.pdf clearly states:

It should be noted, however, that there are alternative routes which could be considered for north-south rail links using former rail corridors including Cardiff-Merthyr Tydfil-Brecon-Builth Wells – Newtown- Oswestry-Wrexham. The original intention of the North and South Wales Railway to link Cardiff more directly with Bangor via Aberystwyth and Llandeilo (rather than Carmarthen) could also be resurrected. This would require a brand new formation between Llandeilo and Lampeter as although authorised through the necessary parliamentary processes in 1886 and 1908 the topography in the area was a key factor in no rail connection historically ever having been built between those two towns. It is understood Network Rail may have carried out some preliminary studies on building a new line in this area.

(my bold)

Does anyone know about these alleged NR studies - background, reasoning, outcome?