Stately Home: It’s the final of the Great Interior Design Challenge and, after starting with 27 amateur interior designers, only two remain. Now they are each out to prove that they are the best. To win the title, each designer must complete their final challenge – however, this time it isn’t just one room scheme, but three rooms each in a stately home. A 19th-century calendar house in Cumbria is the setting for this design showdown. Now converted into individual apartments, our designers take on a living room, a kitchen and a bedroom each with just £4,000 and four days to work with. Our first finalist is given the task of organising a lot of clutter – adding arts and crafts style to the living room, giving a country look to the kitchen and being given free rein in the guest room. But will they get each look right and impress the judges? Meanwhile, their rival designer has been asked for a traditional and elegant look in the living room, a shaker-style in the kitchen and a restful master bedroom. Can they prove they’ve developed a signature style without relying on design cliches? Architectural historian Tom Dyckhoff explains the unusual design behind this grand calendar house, where each architectural detail is related to numbers in the calendar – 365 panes of glass representing the days of the year, 52 chimneys representing the weeks and 12 corridors representing the months of the year. Meanwhile, judges Sophie Robinson and Daniel Hopwood must decide which designer has created the best schemes and deserves to be named champion.