45 year old Chris Bainbridge was found dead at the Quiet Site CaravanPark in Wattermillock on the banks of Ullswater on Monday afternoon.
His wife Jane Bainbridge, who's 43, was taken to the Cumberland Hospital in Carlisle and is in a serious condition.
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Trail hunting, where a scent is laid for hounds and the hunt to follow, has been widely practised since the 2005 ban on fox hunting.
Dangerous chemicals stored in a laboratory at the nuclear reprocessing plant have now been detonated by an army bomb disposal team.
Explosives experts were called to the nuclear reprocessing site in Cumbria, to help deal with chemical substances.