As he teetered on a narrow rock ledge a yak's bellow short of the stratosphere, with a rubber mask strapped to his face, a pair of mittens the size of a sealion's flippers, and a drop of two kilometres below him, it's fair to say Mark Horrell wasn't entirely happy with the situation he found himself in.

He had been an ordinary hiker who had only read books about mountaineering. When he signed up for an organised trek in Nepal with a group of elderly ladies, little did he know that ten years later he would be attempting to climb the world's highest mountain.

But as...

In April 2012 Mark Horrell travelled to Tibet hoping to become, if not the first person to climb Mount Everest, at least the first Karl Pilkington lookalike to do so.

He joined a mountaineering expedition which included an Australian sexagenarian, two Brits whose idea of hydration meant a box of red wine, and a New Zealander who enjoyed reminding his teammates of the perils of altitude sickness and the number of ways they might die on summit day.

The media often write about Mount Everest deaths and how easy the world's highest mountain has become to climb, but how...

In April 2014 Mark Horrell went on a mountaineering expedition to Nepal, hoping to climb Lhotse, the fourth-highest mountain in the world, which shares a base camp and climbing route with Mount Everest.

He dreamed of following in the footsteps of Tenzing Norgay and Edmund Hillary, by climbing through the infamous ice maze of the Khumbu Icefall, and he yearned to sleep in the grand amphitheatre of Everest Base Camp, surrounded by towering peaks.

He was also intrigued by the media publicity surrounding commercial expeditions to Everest. He wanted to discover for himself whether...