Mooh, hear composer Jon English and others sing "Six Ribbons" from the series, in a clip provided be Zip Industries, Australia.
http://www.youtube.com/watch?v=Oh1HnL_ZXP8&feature=related

"Jon English Six Ribbons Arranged Lockley.mov"

Apparently he wrote words as well. The tune in part seems familiar, from an old English trad song, but my memory is out of gear.

?Write or email Zip Industries?

The title of this thread should be "Six Ribbons."
"an old TV series' score" is meaningless as there are hundreds and hundreds.