The 3 remaining files I had eventually downloaded after about an hour or so. They were zip files, 1 containing the mp3 versions of the album, and the other 2 containing the FLAC files. I extracted the first HD folder fine, which contained the first 7 tracks. However, half way through extracting the second folder, my device decided to switch itself off. I retried this, once back up and running, but to no avail. It told me that the file was now corrupt.
I tried to download the file again from the original link I was mailed, but it now will not work. I only downloaded each file once, but it wouldn't work a second time. I've had to email customer services and explain this to them.
All the original files were labelled as HD downloads too, so I had no idea which was which.
Now I'm just waiting. Most probably won't get them until Monday now. Grrr.