Higher levels of ‘unprompted’ awareness of the change were reported in all age groups and all social grade groupings compared with 2020.
Adroddwyd lefelau uwch o ymwybyddiaeth 'ddigymell' o'r newid ym mhob grŵp oedran ac ym mhob grŵp gradd gymdeithasol o gymharu â 2020.