Ymrwymodd Llywodraeth Cymru i gontract gyda Network Rail i wella amlder trenau ar reilffordd Glynebwy, ond cymerodd gamau priodol i atal ac adolygu'r contract hwn pan ddechreuodd costau gynyddu.
He is also calling on the UK Government once again to invest more fairly in Wales’ rail infrastructure, especially given the continued concentration of UK Government railway enhancement spending in the wealthier parts of the UK.