OK. First off. Thanks for the suggestions guys. Much appreciated.
So far this is what I've found.
The Android side of things - I've had partial success with that. The initial problem there was we are running Android 4 (Kit-Kat). If I'm not mistaken that was the one that Google disabled writing to SDCards? The Android apps are picking that up and one of them actually displays that message when I try to save the tags.

So copy the tracks to the Android Music folder, but then the album art gets lost somewhere. Maybe have to get some album art and copy the images to the right location in the Android folder.

Tried Flowplayer but that doesn't seem to want to play the tracks, despite a re-install.
Mp3 Tag Editor from Openrepos has now decided to start working and has found the tracks, but when I edit the tags I end up with multiple copies of the tracks and it also loses some of the tracks, so I'm left with - 1, 2, 4, 5, 6, 9, 10 and 11. Tracks 3, 7 and 8 are not there.