... the last time the UK had large herds of wild grazing animals was several thousand years ago. There's absolutely no way any herd of wild bison could exist in the UK's current "much more intelligent approach".
https://www.kentwildlifetrust.org.uk/projects/wilder-blean
https://www.rewildingbritain.org.uk/why-rewild/reintroductio...
This is mirrored by reintroduction schemes of red kites and beavers in the UK, as well as similar projects with bison, wolves and other species on the European mainland.
That's not to mention deer, which are both wild and doing really well - partly because of the lack of wolves, ironically!
The continental US (i.e. excluding alaska) has some 20+ mil wild deer, 200k bison, 1 mil bears, 3-4 mil coyotes, 13,000 wolves, 5 mil alligators, 10k+ mountain lions, etc, etc. Yes, most are in the vast western states. But deer and bears are common even in areas a just a couple hour drive outside of NYC. Thankfully no gators near NYC (except in the sewers, of course :-)
I just wanted to point out that it seems that the sensitivity for what is ban-able has been turned up