Locked-in syndrome sufferer Tony Nicklinson, who had campaigned to be able to end his own life, has died.
Mr Nicklinson lost his UK High Court battle last week for the legal right to end his life when he chooses with a doctor's help.
His family said he died peacefully following a rapid deterioration in health after contracting pneumonia.
The 58-year-old had been expected to lodge an appeal against the court's decision.
In a brief statement, his lawyers, Bindmans LLP said Mr Nicklinson died at his home in Wiltshire at around 10am.
They also asked for the family's privacy to be respected.
Mr Nicklinson was left paralysed by a catastrophic stroke while on a business trip to Athens in 2005.
A Wiltshire Police spokesman said the force would not be investigating Mr Nicklinson's death.
"Police are not involved at all. We can confirm he passed away and it is not a matter for Wiltshire Police," he said.
"His death certificate has been signed by a doctor, so it is not a matter for Wiltshire Police or the coroner."
