A Tolworth teenager who faints up to eight times a day is taking on three mountain peaks in just 24 hours as part of a charity challenge this weekend.

Former Tolworth Girl's school student Megan Taylor, 18, will climb the three highest mountains – Ben Nevis in Scotland, Scafell Pike in England and Mount Snowdon in Wales accompanied by a friend, a medic and a mountain guide.

She is hoping her condition will not affect her too much.

Miss Taylor said: “I would never put myself in a situation that I know I could not handle or that would put myself or others at risk.

“My medical condition is going to make it harder but it’s not going to be impossible. It’s just as dangerous for me as anyone else. I’m also less likely to faint when active.”

After collapsing at a scout remembrance service in 2011, Miss Taylor had vasovagal syncope with ventricular standstill diagnosed, which causes constant dizziness as well as fainting.

She also suffers hearing loss and poor balance from a skull fracture when she fell.

But the First Tolworth Scout member has been so determined to face up to her condition that she has already taken part in a charity half marathon for the National Deaf Children’s Society.

Her three peaks challenge will raise money for Help for Heroes, a charity dedicated to helping wounded servicemen and women.

The Nescot College student who is studying animal management, said: “On several occasions I have collapsed in the street and have been ignored, accused of being ‘another drunk teenager’.

“One time I woke up to find people stepping over me as I was in their way. I have also, however, witnessed some incredible acts of kindness that restore my faith in humanity.

“I see it as a minor inconvenience. It does get frustrating but I try not to let it control my life. I want to make the most of things. It’s not a problem unless you allow it to be.

“I am very lucky that each time I faint recovery is quick and spontaneous. With a little determination, as long as I am not injured from falling, I am able to simply get back up, smile and continue.”

For more information visit justgiving.com/three mountains-24hours.