Triathlon? Ironman? Fergeddaboutit. A stroll in the park compared to this: the Arch to Arc, a 289-mile run, swim and cycle from London's Marble Arch to Paris' Arc De Triomphe. Only five mortals have ever completed the gruelling course, and on Saturday hedge fund manager Nino Baglione set off on his own attempt to break the current record of 81 hours and 5 minutes. Sadly, having jogged the 89 miles to Dover, his plans were......