@ Anarcho
Oxford is a plan which is already outdated and literally decades behind where society is heading.
The jobs which can't be done from home are very few.
Manufacturing will be automated.
If your job involves any sort of admin processes, you'll be unemployed by 2030.
All legal, medical diagnosis, financial auditing, planning, design, administration, buying, selling, all those jobs will dissappear in the next five to ten years. That's the scale of what's coming.
Oxford Council won't even have the zone signs put up before the whole concept of their 15 minute city is made redundant.
The "problems" which created the need for the 15 minute city won't exist. Therefore the need for a 15 minute city won't exist. Therefore 15 minute cities won't exist.
Again, you need to stop thinking in terms of "current" need.
Imagine city planners back in 1910, all convinced that horses cause too much muck on the streets and something had to be done to stop people having the walk through the piles of horse shit everywhere. So they came up with a complicated system of 15 minute journeys, people no longer needed to use a horse to pull a carriage, they could walk or cycle instead. That would reduce the number of horses and therefore reduce the amount of horse shit.
Meanwhile, they had no idea the Model T was about the roll off the production line.
See what I mean about 15 minute cities. You're thinking about 40 year old solutions to problems which won't exist in a few years.