Sellafield ltd has lost its appeal against fines levied against them last year.
In February, the company was fined £700,000 for sending bags of radioactive waste to a landfill site.
The bags, which contained waste such as plastic, tissues and clothing, should have been sent to a specialist facility that treats and stores low-level radioactive waste, but a number of management and operational failings led to them being sent to Lillyhall landfill site in Workington, Cumbria.
Today, the Lord Chief Justice Lord Thomas, sitting in the Court of Appeal with Mr Justice Mitting and Mrs Justice Thirlwall, said there were no grounds for criticising the level of fines imposed.
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Chilly start. Some frost in places, icy patches possible too. Cloud and sunny spells today, hazier in the west later
Emma Jesson brings you Sunday night's forecast
Not alot of rain in the forecast outlook, but remaining cloudy. Temperatures average by day and above freezing by night