As part of this data collection, Strategic Research & Insight will be gathering information through online questionnaires and telephone follow-ups during the period 2020 to 2022.
Fel rhan o'r casgliad data hwn, bydd Strategic Research and Insight yn casglu gwybodaeth drwy holiaduron ar-lein a gwaith dilynol dros y ffôn yn ystod y cyfnod 2020 i 2022.