Ers yr oedi cyn cyflwyno'r cynllun yn wreiddiol o'r cyfnod buddsoddi cyfredol i'r cyfnod 2019-24, rydym wedi galw dro ar ôl tro ar Lywodraeth y DU i egluro'r amserlenni ar gyfer trydaneiddio Prif Reilffordd Great Western hyd at Abertawe. Byddai'r cynllun hwn wedi sicrhau gwelliannau sylweddol a mawr eu hangen i deithiau rhwng dwy ddinas fwyaf Cymru ac i'r cymunedau ar hyd y llwybr.
Since delivery of the scheme was originally delayed from the current investment period to the 2019-24 period, we have repeatedly called for the UK Government to clarify the timescales for electrification of the Great Western Mainline through to Swansea. This scheme would have delivered significant and much-needed improvements to journeys between Wales’ two largest cities and to the communities along the route.