Bydd Band B hefyd yn cynnwys buddsoddiad ychwanegol gyda gwerth cyfalaf o tua £500m wedi’i ariannu drwy’r Model Buddsoddi Cydfuddiannol newydd ar gyfer Cymru.
Band B will  include additional investment with a capital value of around £500m funded through the new, made-in-Wales, Mutual Investment Model.