It is the third biggest killer in the UK and the most common cause of severe disability – not to mention the fact it costs the economy £7 billion a year.

But despite these statistics, most people's knowledge of strokes is very limited.

A recent survey, for example, revealed that only 33 per cent of people were aware that a stroke causes immediate brain damage, while a mere 59 per cent of men would call 999 immediately upon noticing symptoms of the condition.

Joe Korner, director of communications at the Stroke Association, said: "These results highlight how strokes continue to be misunderstood by the public and is way down on their agenda.

"People simply do not realise the devastation that a stroke can cause or that it can be prevented."

In an attempt to improve people's understanding of the affliction – and raise some much-needed cash at the same time – the Stroke Association has organised National Stroke Awareness Day for Tuesday, May 13.

The main event is Step Up For Stroke – a sponsored walk with the dual aim of collecting money and encouraging people to exercise more.

A spokesman for the Stroke Association said: "Even if you are not able to walk very far you can still join in. Just set yourself a goal, sign up, get walking and raise money for a fantastic cause.

"By taking part in this free fundraising event, you can make a difference no matter what your age or level of fitness.

"Walking can help to reduce body fat, prevent high blood pressure and lower cholesterol levels – major risk factors for stroke."

Langford residents Bill and Margaret Kempton help to run the Ivel Stroke Club and have been directly affected by the condition themselves. Bill, now 74, suffered his first stroke a month before his 50th birthday, and has endured a further 12 strokes since.

The former teacher told the Chronicle: "I had an operation in 1984 and afterwards my leg was very numb and I didn't feel right, but the hospital told me it was just a reaction to the anaesthetic and not to worry.

"But three-and-a-half years later I eventually spoke to a neurologist and he told me I had suffered a stroke.

"A few years later I had a severe stroke that affected my sight, memory and concentration. It also left me weak on my right side and meant I couldn't drive."

Bill's wife Margaret is secretary of the Ivel Stroke Club and encourages those who have been affected to come along to the group's monthly meetings.

"The club organises talks, outings and other social events and we hope it helps people to realise that they are not the only ones who have been affected by a stroke," she said.

"We normally get around 30 people and it really does help sufferers to get out and about and rebuild their confidence."

The Ivel Stroke Club is held at Quince Court, Engayne Avenue, Sandy on the third Monday of every month from 7.30pm. For more details call Margaret or Bill Kempton on 01462 628657.

To get involved with Step Up For Stroke day on May 13, visit www.stroke.org.uk