Thank you.  I hadn't heard of expressways until a few days ago, when I stumbled upon a reddit thread on the subject.  THEN your changeset popped up on my osmcha feed.  

Understand what you've down now and it makes sense to me.

Here's that thread-  https://www.reddit.com/r/openstreetmap/comments/18vamz6/uk_expressways/

Cheers,

Ken