It's semi-finals week, and the remaining three contestants are aiming to deliver their best designs to date, in the hope of winning a place in the big final.Michelle reveals that for their next project they will be working solo. Each has a luxury holiday lodge to upgrade, including an open-plan kitchen, living and dining space, as well as an outside terrace. These beige lakeside lodges in the heart of the Cotswolds may be luxurious, but design-wise they are the epitome of bland, so Michelle asks the designers to make their mark and really impress her with some design flair.With individual themes to work to, each designer takes quite a different approach. One goes against their natural instincts and opts for a bold primary colour scheme, drawing inspiration from a classic 80s movie. Another competitor ignores colour completely, hoping that their sophisticated monochrome scheme will appeal to their 'friends' getaway' target market. And for the third lodge the designer picks a nautical theme, using Cotswold stone, wooden panels on the walls and luxury linens on the sofas.On hand to help Michelle this week is guest judge and queen of dark and moody Abigail Aherne. After a strong showing from all the semi-finalists, Michelle must make a difficult choice as she announces who will be leaving. After a competitive seven weeks, one designers' dream is over, but the final two now have a shot at winning their first commercial contract.