A wnaiff y Prif Weinidog egluro pa ddogfen benodol yr oedd yn cyfeirio ati pan ddywedodd nad oedd llinell Glynebwy wedi'i chynnwys yn y fanyleb wreiddiol ar gyfer trydaneiddio'r rheilffyrdd, mewn ymateb i gwestiwn gan Leanne Wood yn ystod cwestiynau i'r Prif Weinidog ar 19 Mawrth 2018?
In November 2015 the Welsh Government published “Rolling Out our Metro” and established a dedicated web site at:
http://gov.wales/topics/transport/public/metro/?lang=en
The document and web material clearly describe the extent of the next phase of Metro (phase 2) and the modes and technologies which can be expected across Metro as part of phase 2.
This web site was quoted from in the June 2017 Economy, Infrastructure and Skills committee report “On the Right Track? The Rail Franchise and South Wales Metro”