O gyfuno hynny â’r £58m a gyhoeddwyd gan Lywodraeth y DU ar gyfer yr orsaf drenau, y £40m sydd eisoes wedi’i addo gan bartneriaid Bargen y Ddinas a’r £15m oddi wrth Rheilffyrdd Trafnidiaeth Cymru, dyna becyn ariannu o ryw £150m gan y sector cyhoeddus a darparwyr trafnidiaeth ar gyfer y gyfnewidfa newydd.
Combined with the £58m announced by UK Government for the railway station, the £40m already pledged by City Deal partners and £15m from TfW Rail, this amounts to a funding package of around £150m from the public sector and transport providers for the new interchange.