I'm surprised you've never heard it as not only is it referred to as such on anything official, most people in the area still make the distinction and call it the East Riding, rather than East Yorks.
-shires, this is the only one that is not accpeted in "short form" (West York)
This is too hard
Why can;t we just simply go back to pre 1974 It was so much simpler.
By the way, I think that historically Bristol has at some time counted as part of Gloucestershire, but never as Somerset