Tom and Catherine Kordel and their young children Sadie and Cleo recently moved to St Albans but have no idea what to do with their garden, as they haven’t owned one before. All they know is that they want it to be both practical and fun, with wooden play structures, good storage and a place to grow fruit and veg. The budget is £4,500, so there’s plenty of scope for Arit and the Rich brothers to get creative with their designs. But who will win the right to make the Kordels' garden dreams come true?