Update after talking to Sky Technical assistance. Follow following procedure to identify if subtitles actually broadcast:-
- Sky+ button,
- Services button,
- Options menu,
- Sky+ setup,
- Right arrow to "subtitles",
- Down arrow to "Highlighted programmes",
- Arrow to "subtitles",
- Green button to save this setting.
TV Guide button, all program mes with subtitles broadcast (ie BBC) will be highlighted with blue text & WHITE background, Scroll to 799 (TV5). No subtitle being broadcast (BLUE background, white text)