A lawyer for Tony Nicklinson said he contracted pneumonia and went rapidly downhill after the High Court's decision last week.
Mr Nicklinson told his lawyer that he was "totally devastated."
He died with his family beside him this morning.
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George Ford booted 24 points as Bath kept the pressure on Northampton at the top of the Premiership with a 39-16 win at rivals Gloucester.
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The funeral of a mother and newborn baby found dead after going missing from a maternity hospital took place today.