The reshuffle of Britain's biggest coal producer has safeguarded 2,500 jobs across the UK.
UK Coal has split its operations into two businesses after the company, which generates around 5% of Britain's electricity requirements, slumped to a loss in the first half of the year as production at Daw Mill mine near Coventry plunged.
The new reshuffle is said to have safeguarded jobs at the Coventry-based mine.
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The 74-year-old was on vacation in Blackpool but is from the Midlands.
Oxygen levels are believed to have suddenly dropped, causing the fish to die.
John Preece is 75 and believed to be in the early stages of dementia.