UK Coal is consulting on closing the biggest coal mine in the UK under plans to restructure the business, jeopardising 800 jobs.
The group is considering closing Daw Mill near Coventry by early 2014 when current coal panels will have been exhausted.
It said Daw Mill has considerable long-term resources but production is 175,000 tonnes behind budget.
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His parents from Kirk Hallam are now warning parents about the beds, which have bases that hinge upwards to reveal a storage space inside.
The history of Clumber House is to be displayed in a new exhibition. The mansion in Sherwood Forest was demolished in 1938.
Showers will continue through the day and may turn locally heavy with a risk of hail and thunder.