Today Charlie Dimmock and the Rich brothers compete to design a zen space for a young couple longing for a Japanese garden. With a £7,000 budget, our designers bring a taste of the orient to Blackburn, turning the couple's mismatched garden, into an area of tranquillity and serenity. There's a teahouse, enormous rocks and a pond. It's a big build and not one for the faint hearted.