Kevin McCloud looks back at some of the most incredible projects Grand Designs has followed in celebration of the show's 25th anniversary. He takes a look at the most experimental projects, the largest and the smallest, the longest and the shortest, the most agonising and the most emotional projects, as well as the greenest and those that have been genuinely life-changing. He celebrates the triumphs, commiserates the disasters and enjoys some of the funniest scenes, as well as giving an exclusive behind-the-scenes insight into the filming of some of the most iconic moments in Grand Designs history.