I can't stop biting off more than I can chew. Maybe I'm wearing everything out, but I believe the body is a fantastic thing and it will repair itself and I'll go again. If it's running too rich, I don't stop what I'm doing, just weaken the mixture and carry on. Since we last heard from him, Guy Martin has restored a 1983 Williams F1 car then raced Jenson Button in it; helped to build a First World War tank; ridden with Putin's favourite biker gang the Night Wolves; competed on the classic endurance circuit; stood on top of one of Chernobyl's nuclear reactors and taken part in his last ever Isle of Man TT.