Used the Pen tool to create vector masks to isolate the 3 main images. Clipping masks for the the frames to the left.
The difficult thing ( for me ) here was trying to make the images to be based on only two colours. With a lot of trial and error, and a little research I found that the solution is create duotone images.
Each image begins as a smart object, that way the duo tone can be create idepently of the main file. This is important as one of the steps is to make the image greyscale which would affect the whole file
- Image > Mode > Greyscale
- Image > Mode > Duotone