Data is collated by local authorities into an electronic return and submitted to the Welsh Government through DEWi, a secure online data transfer system developed by the Welsh Government.
Menter Cyfnewid Data Cymru (DEWi) yw’r wefan ddiogel a ddefnyddir i drosglwyddo data rhwng ysgolion, awdurdodau lleol, a Llywodraeth Cymru.