<p><b>The million-copy selling truck fitter returns<br><br>***Featured on Channel 4***<br></b><br><b>''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.''</b><br><br>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.<br><br>Then there''s the stuff he really can''t wait to get out of bed for: 12-hour shifts for a local haulage firm and tatie farming in his new John Deere tractor.<br><br>Besides all this, he''s saved his local pub from closure and become a dad.<br><br>But let h