Eglurais y byddem yn cefnogi adolygiad os yw’n golygu bod Llywodraeth y DU yn cyllido ei chyfrifoldebau presennol i Gymru yn ddigonol mewn meysydd fel seilwaith rheilffyrdd a hedfan.  Fodd bynnag, ni fydd y Llywodraeth hon yn cefnogi unrhyw adolygiad sy’n ceisio tanseilio neu sathru ar y setliad datganoli cyfredol.  Rhaid i’r adolygiad osgoi sylwadau a chynigion ar faterion fel y rhwydwaith traffyrdd a chefnffyrdd datganoledig, sy’n gyfrifoldeb clir i Lywodraeth Cymru a’r Senedd.
I made clear that we would support a review where it leads to the UK Government adequately funding its existing responsibilities to Wales in areas such as rail infrastructure and aviation.  However, this Government will not support any review which seeks to weaken or trample over the existing devolution settlement.  The review must avoid commentary and proposals on matters such as the devolved motorway and trunk road network, which are the clear responsibility of this Welsh Government and Senedd.