Since my last post I have refined my design (sketch below). However when I came to finalise which country’s I was going to use and look at the data in more detail, it became apparent that even this design would not end up the way I had envisioned, although I believe I can still use the basic design if I make some changes, such as the data used. This was due to an oversight on my part. The mistake I made was that I did not look at the data thoroughly enough during the design process and made assumptions! I feel that I have learnt by this and that it is a mistake I will not quickly repeat.