An autism charity worker is taking on an epic fundraising challenge nearly five times longer than his previous half marathon. Chris Sturm, who works at Prior’s Court in Hermitage, will be running the 100km Race to the Stones challenge on July 13 and 14. Mr Sturm ran the London Landmarks Half Marathon in aid of Prior’s Court last April. But this challenge is nearly five times longer than his last effort, consisting of two 50km ultra-marathons along The Ridgeway, ending at the 5,000-year-old Avebury Standing Stones. And to top it all off, Mr Sturm will be camping overnight between the two runs. …