Once these studies have been completed, there will be a period of internal and external consultation before further funding can be secured, and RIBA Stage 3 designs are commissioned.
Unwaith y bydd yr astudiaethau hyn wedi'u cwblhau, bydd cyfnod o ymgynghori mewnol ac allanol cyn y gellir sicrhau cyllid pellach, a chomisiynir dyluniadau Cam 3 RIBA.