A jewellery-making grandmother Harriet Whinney is putting her new perfect eyesight to the test on a gruelling 300-mile charity bike ride through India at the end of October.

Only two years after undergoing life-changing eye surgery, Harriet, 57, from Isle Brewers, near Taunton, is hoping to raise £3,000 for the National Hospital for Neurology and Neurosurgery - a new research centre in London investigating the causes of brain conditions like Alzheimer's, Parkinson's, epilepsy and strokes.

Next Wednesday, October 24, Harriet will embark on a mammoth six-day off-road bike ride through Rajasthan, covering 50-miles a day and sleeping rough overnight in tents. "It will not be comfortable," she predicts.

Although taking up cycling at the relatively late age of 50, Harriet has wasted no time and already has two long distance charity rides to her credit - the first in India in 2004 and the second through the Brazilian Rainforest a year later.