Taking Idris Khan's idea of layering images, I found images on the Internet of shop fronts. The concept for this was that shopping centres are homogeneous nowadays, since they all consist of the same retail chains. Whether you visit Birmingham, Bristol or Brighton, you're bound to find a Next, Costa and Boots.
Once again I used the Photoshop Mix app, which was very easy to use. Unfortunately, it would only allow a maximum of 6 layers. However, at the moment I am experimenting with themes and techniques. If I choose to develop this further, I will be able to use the full version of Photoshop.