"It felt like we were marching through a battlefield. People were gasping for breath and shouting for help. Lots didn't make it to the end, either collapsing from exhaustion or unable to take the pain any longer."
That is how one friend dramatically described the 24-hour, 100km charity walk from London to Brighton. What was I thinking when I signed up? But since making that rash decision last November, I've had little choice but to lace up my first ever pair of walking boots and take to the streets of London. It has been a refreshing – and blistering – experience.