Cornwall Council has backed a petition urging the UK Government to recognise Cornwall as the fifth nation of the United Kingdom, seeking devolved powers and formal acknowledgment of the county's distinct heritage and language.

The petition, which calls for Cornwall to be granted equal status with England, Scotland, Wales and Northern Ireland, has received nearly 23,000 signatures and passed a council motion by 53 votes to 22. Because it has exceeded 10,000 signatures it will receive a formal government response; it needs 100,000 signatures to be considered for debate in Parliament. The petition will close on Thursday after being open for six months.

The document filed with the government urges recognition of Cornwall's "distinct heritage, language, and historic autonomy" and requests devolved powers, cultural preservation and official status similar to that of Wales and Scotland. It says Cornwall has a "rich cultural and historical identity" and highlights Kernewek, the Cornish language, as part of that identity.

Leigh Frost, the council's Liberal Democrat leader, said on social media the campaign was not about independence but about local decision-making. "This isn't about independence, it never has been," Frost said. "This is about making sure decisions for Cornwall happen in Cornwall. We are not just a bit of England at the end of the trainline, we are a strong, proud Celtic nation."

Not all councillors supported the motion. Most Reform councillors voted against it. Rowland O'Connor, the Reform deputy leader on the council, told The Times that the motion presented a false choice between being English and being Cornish, adding that many residents felt both identities.

Perran Moon, identified in council notes as the Labour MP for Cambourne and Redruth, said the campaigners were not separatists but sought a stronger voice for Cornwall within the UK. "We are not separatists, we want to play our part economically and culturally within the UK and we just don't feel that voice is being heard," Moon said.

Council leaders and local MPs have also opposed plans for a combined mayoral authority with neighbouring Devon, saying it would dilute Cornwall's ability to secure funding and devolution tailored to its needs. The petition and the recent motion form part of a broader local debate about how devolved powers and regional governance should be arranged in southwestern England.

Under current UK constitutional arrangements, Cornwall is administered as a county of England. The petition seeks to change that status through recognition and new devolved powers, but it does not by itself change legal or constitutional arrangements. The government is required to respond to petitions that exceed 10,000 signatures; a threshold of 100,000 is needed for consideration for a parliamentary debate.

The petition's backers, and the council leaders who promoted it, have encouraged residents to sign in the petition's remaining days. The outcome of the government response — and whether the petition reaches the 100,000-signature threshold to prompt formal parliamentary consideration — will determine whether the issue proceeds to a wider national debate.