The Nuclear Decommissioning Authority has published its latest financial accounts and has revealed that the cost of cleaning up Sellafield nuclear plant in West Cumbria was nearly six billion pounds over its estimate for last year.
The authority described the decommissioning of Sellafield as "one of its most challenging environmental restoration projects."
Last year, nuclear management partners - who were awarded the contract, were heavily criticised for initial overspend on the clean up project.
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