The first stage was completed in November by Olbell3 and is due to be published in January 2021 on the Welsh Government website.
Cwblhaodd Oldbell3 gam cyntaf y gwerthusiad ym mis Tachwedd, a disgwylir iddo gael ei gyhoeddi ar wefan Llywodraeth Cymru ym mis Ionawr 2021.