Between 11 and 17th September 2021 Mark attempted to break the Guinness World Record for the Longest Marathon Lecture. The existing record is 139 hours 42 minutes and 56 seconds and amazingly Mark spoke for 140 hours and 42 seconds. He is now waiting to hear from Guinness whether his attempt has been validated. During the attempt Mark raised almost £13k for Barnardo’s, engaged with schools around the world through some prepared lesson plans and worked with sleep scientists to explore the impacts of extreme sleep deprivation. The attempt pushed Mark to his psychological limit as he suffered memory loss and hallucinations having just had 3 hours sleep across the 140 hours.
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