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The family of a woman who lay dead for TWO DAYS while her three-year-old son cried "I can't wake mummy" have launched a campaign to raise awareness of deadly asthma.

Lydia Macdonald, 28, stopped breathing in her sleep and her son Mason survived without proper food or water for two days .

Lydia's best friend went to her home after becoming concerned that no-one had heard from her.

Dehydrated Mason, whose dad died just several years before he lost his mum, was heard crying: "I can't wake mummy ."

The youngster, now four, had survived on a block of cheese he found in the fridge while his mum's body lay just yards away.

(Image: Cascade)

Now Lydia's mum Linda, 58, is spearheading a campaign to raise awareness of asthma, which kills three people every single day in the UK.

Linda, who now looks after Mason alongside his granddad Ron, said: “I am now starting a campaign in Lydia’s name – asthma can kill, but unlike cancer and other killers, no-one knows how severe it can be.

(Image: Cascade)

“We hope by sharing Lydia’s story it can save at least one other person’s life.”

Linda and Ron have launched the Lydia Macdonald Tribute Fund working with Asthma UK.

She told The Sun : "We were absolutely devastated. The light she brought to every room had gone out.

“Lydia was so strong and independent, she passed that onto Mason and somehow he managed to feed and water himself for all that time."

Linda and Ron tell Mason his parents are the "brightest stars in the sky" and say the youngster is "doing fantastically" despite his ordeal.

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(Image: Cascade)

Lydia, who died in 2015 at her home in Perth, Scotland, was diagnosed with severe asthma when she was just two.

She suffered a horrific attack in 2001 when she was 14 that caused her lips to turn blue and she was kept on oxygen for a week.

Lydia, who trained as a hairdresser, met Bobby Martin in 2011 and gave birth to Mason the following year.

But Bobbie died suddenly just eight months after Mason's birth.

(Image: Cascade)

Linda described how her daughter was devastated when Bobby died but Mason gave her "a reason to carry on".

Grieving Linda also said the last time she saw her daughter, she was happy, laughing and dancing with her son.

Visit the Lydia Macdonald Tribute Fund website here for more information.

Details from Asthma UK are also available here .