Yn y llythyr, ymunodd arweinwyr llywodraeth leol â’r Gweinidogion i fynegi eu pryderon dwys ynghylch y diffyg manylion sydd ar gael o ran cael cyllid cyfatebol i gyllid yr UE.
In the letter local authority leaders also joined the ministers in expressing their deep concerns on the lack of detail available for replacement EU funding.