Hello and thanks for your response. I did actually go into each song on the album and add something (the composer). I also thought that perhaps the only way to get the whole CD of songs to play was to create a playlist - which I did.
I had already deleted all songs and uploaded them again from the CD and they did all show in Recently Added it was just under the actual album that they didn't show.
Then, very strangely, all songs on the album started to show everywhere and when I attached my mobile to sync the songs were all there, but greyed out, and then suddenly they were not greyed out anymore and I can see them.
Although it is a CD from one band it is classed as a compilation by iTunes so I wonder if that had anything to do with it as iTunes doesn't handle compilation albums well (and classifies albums in a strange way anyway).
Thanks for your help. I don't know what did it but the problem is resolved.