It is the final of the Great Interior Design Challenge, and after starting with 24 amateur interior designers, it is down to the last two. This time the stakes are raised as each amateur interior designer is given a grand Georgian house where they must redesign the hallway, front room, guest room and a child's bedroom. It is a huge undertaking. The money has gone up to £4,400 and they now have 72 hours, the help of two builders and a decorator. Architectural historian Tom Dyckhoff reveals the history of these beautiful Liverpool homes. Daniel Hopwood and Sophie Robinson must judge who deserves to win - but it is a tough decision as there are very different designs on offer.