| Group 1 | The district councils of Aberconwy; Alyn & Deeside; Montgomeryshire; Preseli Pembrokeshire; Llanelli; Ogwr; Cardiff; Blaenau Gwent; Rhondda. |
| Group 2 | (i)The county councils of Clwydand West Glamorgan; and (ii)the district councils of Colwyn; Arfon; Brecknock; South Pembrokeshire; Swansea; Taff Ely; Torfaen. |
| Group 3 | (i)The county councils of Gwent and Gwynedd; and (ii)the district councils of Delyn; Dwyfor; Radnor; Carmarthen; Lliw Valley; Merthyr Tydfil; Monmouth. |
| Group 4 | (i)The county councils of Mid Glamorgan and Powys; and (ii)the district councils of Glyndwr; Dinefwr; Port Talbot; Rhymney Valley; Vale of Glamorgan; Ynys Môn-Isle of Anglesey; Newport. |
| Group 5 | (i)The county councils of South Glamorgan and Dyfed; and (ii)the district councils of Ceredigion; Cynon Valley; Islwyn; Meirionnydd; Neath; Rhuddlan; Wrexham Maelor. |