Erbyn diwedd y flwyddyn, rwy'n disgwyl adroddiad manylach gan Network Rail ar amserlen y gwasanaethau a'r opsiynau o ran cerbydau, ynghyd â gwaith pellach ar gostau'r isadeiledd. Bydd y gwaith hwnnw'n dylanwadu ar sut yr awn ati i roi'r prosiect trydaneiddio ar waith.
By the end of this year I expect a more detailed report on the potential service timetable and rolling stock options, coupled with further work on the infrastructure costs from Network Rail. This work will inform how the electrification project is taken forward.