This had been discussed on the newsgroup, so I did a Google search and came up with this reply by Graeme to a query about Josette's theme.
>>For any DS fans that are also PRISONER fans, did you know Josette's Theme is used in the PRISONER episode "Dance of the Dead"?
>>
"Yes, I know. That's because it was written by Robert Farnon, who wrote some of the music for The Prisoner (including an unused main title song).
It's also the reason Dark Shadows abandoned it and replaced it with the later version, written by Robert Cobert. They wanted a version that they had the rights to.
Incidentally, Farnon's main title theme is NOT the one used in the Alternate version of the Chimes of Big Ben. That one's by Wilfred Josephs. And the main one is by Ron Grainer, who also did the Dr. Who theme.
Unfortunately, Farnon's version of Josette's Theme isn't on any of the three Prisoner albums. There are however, four other tracks by him."