I know it's not Jubilee line, but Celia Drummond does voice it (does she?). I would like to know who voices the station announcements, and if anyone has a video or file. It may be Anita, but nothing says whether or not.
@tasoster , I believe Elinor Hamilton voices the announcements you are referring to which are now found on station platforms on every line. The automated Customer Service Announcements are also hers and perhaps fittingly her late husband Phil Sawer voices the security announcements.