Britt Ekland was with Roger Moore as Bond and Ian Ogilvy as The Saint

The episode Murder Cartel guest starred Britt Ekland.
Britt Ekland never appeared in the Roger Moore series but she of course did appear with him in the Bond film The Man With The Golden Gun playing Bond girl Mary Goodnight.

Her biography on the Return of the Saint release stated of course that she was the Bond girl in aforementioned Bond movie but neglected to mention that the Bond in this movie was Roger Moore.
Of the films that it mentioned that she worked on I thought it was an oversight for it not to have mentioned her cameo in Fraternity Vacation as I watched it for one particular scene although not one that had her in it.