WH
Possibly because all of the idents were made at Yorkshire (via their Ballistix design outfit).
Whataday
Founding member
From what I can see, the Yorkshire TV idents did make it to air. Here are eighty different versions of the ident, if you're interested:
https://www.youtube.com/watch?v=kWPQsXYUbgw
https://www.youtube.com/watch?v=kWPQsXYUbgw
Possibly because all of the idents were made at Yorkshire (via their Ballistix design outfit).