To find out what he has been in, you would need to search for him on databases like:
* IMDb: This is the most comprehensive database for movies and television shows. You can search for Edmund Penney there.
* British Film Institute (BFI): This organization keeps a database of British films and television shows, which may include Edmund Penney's work.
It's possible that he has worked in smaller productions, independent films, or theatre. Searching for him on these databases and in local theatre archives could give you more information.