The leader of Caerffili council, Cllr Philippa Marsden, together with the county's three MPs, have written to Boris Johnson to call for Caerffili County to be included in the UK government's Community Renewal Fund.
Caerffili MP Wayne David, Islwyn MP Chris Evans, and Merthyr Tudful and Rhymni MP Gerald Jones have written to UK's Prime Minister to raise their concerns.
The move comes after Caerffili County was excluded from a list of one hundred areas that are set to receive the funding.
The Community Renewal Fund is a new £220million package provided by the UK Treasury as a precursor to the UK Shared Prosperity Fund, which will come into effect in 2022.
The Community Renewal Fund, which is designed to replace EU structural funds, has been criticised because it allows the UK government to invest directly in local authorities— bypassing the Senedd altogether.
Speaking to the Caerphilly Observer, Caerffili MP Wayne David called it a “crude attempt to undermine devolution”.
On 24 March, Finance Minister Rebecca Evans, and her counterparts in Scotland and Northern Ireland, issued a joint statement to outline their concerns about the UK government's bypassing of the devolved governments when allocating the replacement EU funds.
Eleven local authorities have been included in the funding: Blaenau Gwent, Sir Gâr, Ceredigion, Conwy, Ynys Môn, Merthyr Tudful, Castell-nedd Port Talbot, Sir Benfro, Rhondda Cynon Taf, Abertawe, and Torfaen.