Remember the one about the guy from Upstream attempting to run 320 kilometres non-stop in the Himalayas in search of a world record and cash for charity? Well, he’s at it again!

Deputy chief sub-editor Jamie Ross Mackenzie will set off at 6am on Sunday, 28 May from Everest Base Camp in an attempt to reach the Nepali capital of Kathmandu in under 63 hours and eight minutes.