On 1 November 2021, a temporary reclassification of the three Denbighshire/Conwy Valley spatial units CL1, CL2 and GW1.
Ar 1 Tachwedd 2021, ailddosbarthwyd tair uned ofodol Sir Ddinbych/Dyffryn Conwy CL1, CL2 a GW1 dros dro.