Hi,
I can help you with this task. I spent almost 8 years in the footwear industry, more on the production side. However, the photos are good to see the design of the shoes. It won't be possible to work out what kind of materials are used just by looking at the photos. It is necessary to examine your shoes by touching and smelling and looking at them in real, not on the photos. Where in the UK are you located? I am from London. I am not there at the moment, though, as I am teaching at a university in Moscow now. However, a good acquaintance of mine who is also a very good specialist in shoe production might agree to help you to identify the materials of your shoes. I have to check whether he is available for that in the near future. If he agrees to help you, then we could work together with him on this project: I would write the descriptions and he would provide his opinion regarding the materials used.
Best regards,
Tatiana