One lap, 400 miles, seven days: GP aims to set record on Cornwall perimeter run

Elsey Davis will tackle 18,000 metres of elevation on run to raise awareness of young-onset Alzheimer's for her mum

Most runners are content with a lap of their local park. But for one Cornish woman that is not nearly enough: she is aiming to race around the perimeter of her home county and set the fastest known time for the route.

Elsey Davis, 36, a professional trail runner and GP, calculates she will run about 400 miles and tackle more than 18,000 metres of elevation - the equivalent of two Mount Everests.