Mae Llywodraeth y DU wedi hen ddylanwadu ar y farchnad er budd meysydd awyr mawr yn Lloegr. Byddai datganoli'r Doll yn helpu i greu cystadleuaeth decach.
The UK Government has for too long distorted the market in favour of larger airports. Future devolution of APD would go some of the way to levelling the playing field, which has been skewed in favour of other large airports in England.