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Why it matters: The five district and borough councils say a single "mega-council" covering a vast geographical area could not focus on the competing needs of three-quarters of a million people as effectively as multiple unitary authorities.

What's driving the news: Suffolk County Council supports creating a single unitary authority covering the entire county, but this has been unanimously rejected by the five district and borough councils it would replace.

The details: Babergh District Council, East Suffolk Council, Ipswich Borough Council, Mid Suffolk District Council, and West Suffolk Council have each approved the report following a series of meetings where councillors examined and shaped the proposals.

In a joint statement, the council leaders said: "Multiple unitary authorities will produce services designed with residents in mind to meet local needs, drive improved outcomes, create value and save money in a sustainable way."

"Our joint proposal demonstrates that a one-size-fits-all mega authority will not solve the existing issue of large countywide services that will continue to drain money, require improvement, and potentially lead to further cost cutting."

By the numbers: The interim report claims multiple unitary authorities will provide:

• Cost-effective and high-quality services for Suffolk residents

• Long-term financial sustainability

• Economic growth and support to local industry

• Stronger democratic representation and community engagement

• Governance systems which can adapt to future growth

• Structures to support thriving communities and economies

The bigger picture: The councils argue their approach would support "a more balanced solution for the governance of the Mayoral Combined Authority" being set up next year for Norfolk and Suffolk.

What they're saying: "This is a generational change to the way local government and services are delivered and something we should seize," the council leaders stated. "It is a real opportunity to think holistically about how services such as leisure, housing and social care could help residents to thrive."

What's next: The interim report does not constitute a final decision. Councils will have further time to develop options to redesign local government, with community views "at the heart of this work."

The bottom line: "Our collective solution is the best way to deliver great services and value for money. It makes sure the 'local' stays in Local Government for Suffolk," the council leaders concluded.