[Cross-posted ]
The "Speakerthon" event is in progress at New Broadcasting House in London:
https://commons.wikimedia.org/wiki/Commons:BBC_voice_project
We've already added sound files to the (English) Wikipedia articles on Tim Berners-Lee, Agnetha Fältskog, Stanley Johnson and Adrian Lester, with many more uploaded and awaiting templating:
https://commons.wikimedia.org/wiki/Category:BBC_voice_samples
Volunteers are beavering away, finding more sound clips to upload.