Jon Barrick, Chief Executive of the Stroke Association, said:
"We are deeply saddened to hear that Cilla Black died following a stroke. She is one of the hundreds of thousands of people affected by stroke every year.
“It happens out of the blue, often with no warning signs and is more common than people think. While the majority of people will survive, they have to live with its long-term effects.
“Advances in medical research have helped to halve the numbers of people dying of stroke over the last 20 years, yet stroke remains one of greatest health challenges of our time. It is the second biggest killer in the world and the leading cause of adult disability in the UK.
“For the family and loved ones who have to deal with its impact, stroke can be devastating. The Stroke Association is the UK’s leading stroke charity, we are there every step of the way helping survivors and their families deal with the practical and emotional impact of stroke.”