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.