PHE is consulting on the plan on behalf of the four UK Governments which was published on 29 June 2018 and runs until 27 July 2018.'
Cafodd y ddogfen ymgynghori ei chyhoeddi ar 29 Mehefin 2018, ac mae cyfnod yr ymgynghoriad yn dod i ben ar 27 Gorffennaf 2018.