Following the 2012 restructure of amateur rugby league in Great Britain, it was renamed the South Wales Premiership.

[1] The RLC Welsh Championship division was restructured after four West Wales clubs failed to fulfil their fixtures.

Amman Valley Rhinos, Dinefwr Sharks, Swansea/Llanelli Dragons and West Wales Wild Boars were omitted and replaced with newly formed Dyffryn Devils.

Due to logistical issues 2023 Champions (in their debut season), South Wales Jets were allocated the Welsh League place in the Challenge Cup.

[6][5] Source:[7] The South Wales Premiership has, on occasion, held a shield/plate competition for clubs who failed to reach the playoffs: During the RLC era, a second tier competition was held for a brief period called the "RLC Wales Regional".