"15 minute city" is the most misinterpreted policy of our times. The idea is to try to make sure that there are enough services near enough to residential areas that short trips are possible, not to enforce this. It's just the oppposite of "simcity mode" where a huge area is zoned as only housing.

That combined with some anti-rat-run measures in Oxford (and any anti car measure ever) into outraged paranoia.