Plot: As the competition to find Britain's best shed reaches its climax, George Clarke and his fellow judges look at the final groups of shortlisted sheds battling it out for a place in the grand final. The 'Normal' sheds prove anything but, with one of the smallest discos in the world up against a Dad's Army themed shed complete with air raid siren, as well as a 1970s amusement park in a shed with a 12-foot working Ferris wheel outside