Image copyright Susie Hewer Image caption Peggy Walton died in 2005, eight years after being diagnosed with vascular dementia

As figures show dementia has overtaken heart disease as the leading cause of death in England and Wales, Susie Hewer recounts the "surreal" and "distressing" way the condition affected the last eight years of her mother's life.

Peggy Walton was 81 when she was diagnosed with vascular dementia in 1997. shortly after going to live with her daughter's family in Ewhurst Green, East Sussex.

The condition, the UK's second most common type of dementia after Alzheimer's disease, is caused by problems affecting the supply of blood to the brain.

Recounting the experience, Mrs Hewer, 59, said her mother "was as bright as a button and very fit and active when she first came to live with us, so it was a complete shock when she had a series of mini strokes.

"When we first went to the doctor he said, 'It's just old age catching up with her - senile dementia.'

"It was only when it got to the stage when she did not seem to know where she was that we went back. Thankfully, a different doctor recognised the symptoms immediately and referred us to a specialist."

Mrs Hewer said "people then spoke about dementia in hushed tones - they were frightened by it," and describes seeing her mother battle the disease as "absolutely surreal" and "very distressing".

'People in wardrobe'

Peggy started going missing from her home and experienced violent mood swings.

Her "normally placid" mother had become "violent and aggressive".

"It became obvious that she couldn't be left alone for long and so I left my job in retail management to care for her," added Mrs Hewer.

There were also a number of psychotic incidents.

"She was so convincing by the way when she was shouting that there was someone in the wardrobe. She truly believed it. I wanted to go and look myself."

Image copyright Susie Hewer Image caption Susie Hewer with some of her marathon medals - and as a young girl with her mother

Mrs Hewer said it was a very difficult period, especially for her husband Mike, but he was very patient and caring and they managed to cope.

However, there came a point when her mother "no longer knew that I was her daughter and this was a terrible time for me".

Peggy eventually became incapable of doing anything for herself and was in need of 24-hour care. She did not sleep for more than 30 minutes at a time, and became incontinent.

Mrs Hewer said for the last few months of her life Peggy lived in a nearby care home where the staff did a wonderful job in looking after her, but the experience for the family was "heartbreaking".

She died in March 2005, the day after her 89th birthday.

How can we keep Alzheimer's at bay?

Too many delay seeking dementia diagnosis

Living with dementia

Mrs Hewer says she was shocked by the new figures from the Office for National Statistics, "but not entirely surprised because the reporting of dementia has improved".

The symptoms of dementia, she said, were not so easily understood at the time her mother was suffering.

Since then Mrs Hewer has raised more than £50,000 for Alzheimer's Research UK in memory of her mother by running more than 100 marathons.

She became first person to knit and crochet while running a marathon - achievements marked by Guinness World Records - and has a blog, Extreme Knitting Redhead, on which she records her efforts and thoughts about dementia.

"It was a horrendous experience for us - none of it made sense at all," added Mrs Hewer.

"That's why I am so in favour of research and the awareness campaigns as they help families dealing with the condition."