Phil Spencer travels back to Cambridgeshire to catch up with a couple he and Kirstie Allsopp first met three years ago when they were struggling with what to do with their three-bed semi. Amber Brammah, who was leading fitness classes from the garage, wanted a new house with more room to run her business, while ecologist husband Martin preferred the idea of renovating. Having made their decision, how have things changed in the 36 months since?