I saw @ledlecreeper27@lemmygrad.ml 's post and wound up making a larger version of it (with my own changes)
Update- wound up making a expanded version
and a notion of how it would look amidst a better world (not overly serious, borders subject to change)
Creating a DMZ between England and Wales isn’t enough, Offa’s Dyke needs to be re-dug and extended.