Rydym wedi cael gwybod nad yw’r Adran Drafnidiaeth, hyd yma, wedi gorffen y fersiwn derfynol o’r achos busnes, ond rydym yn edrych ymlaen gael at ei gweld unwaith y bydd wedi’i chwblhau. Er hynny, mae’n galonogol iawn gweld bod arwyddion y byddai trydaneiddio’r llinell gyfan rhwng Abertawe a Llundain yn esgor ar fanteision amlwg a sylweddol iawn, a bod modd llunio achos busnes cadarnhaol iawn.
We are informed that the Department for Transport has not yet completed the final version of the business case, which we look forward to seeing once finished.  However I am greatly heartened by indications that there are very significant demonstrable benefits to the electrification of the entire route between Swansea and London and that a very positive business case can be made.