Rwyf wedi ysgrifennu at Ysgrifennydd Ariannol y Trysorlys, y Gwir Anrhydeddus Mel Stride AC heddiw, i hysbysu Llywodraeth y DU am fwriad Llywodraeth Cymru i ddechrau proses Deddf Cymru 2014 yn ffurfiol.
I have today written to the Financial Secretary to the Treasury, the Rt Hon Mel Stride MP, to inform the UK Government of the Welsh Government's intention to formally start the Wales Act 2014 process.