Consisting of five hours of music-led entertainment programming each weekday, Radio Cymru Mwy was available on DAB in south east Wales and online.

[2] BBC Radio Cymru 2 began broadcasting at 6.30am on 29 January 2018, initially offering a separate daily breakfast show.

[3] The service was later expanded to carry regular additional sports commentaries - particularly on football and rugby - on midweek nights and at weekends, as well as occasional music-led special programming.

On 4 August 2022, at the National Eisteddfod in Tregaron, the BBC announced plans to expand Radio Cymru 2's programming from 15 to 60 hours a week, offering "a Welsh language music-based schedule".

[4] From 3 October 2022, Radio Cymru 2 aired an additional two-hour mid-morning show each weekday, presented from the BBC's Bangor studios by Lisa Gwilym on Monday - Thursday from 9-11am and from Cardiff by Dom James on Fridays from 11am-1pm.