Green belt issues were sorted long time ago. OCC commissioned a study to look at the viability and potential harm to other green belt sites of releasing some areas to development. This was in line with central government policy to alleviate housing shortages and to facilitate outdoor sports.
That policy identified various sites as being open to consideration. My favourite of those sites is the Old Marston area. Just over 58 hectares of land. (there is a sub section of 17 Ha around Hill View Farm but I suspect that there may be some opposition from the current inhabitant!)
The best plot of all has already been given the go ahead. This is the, so called, Northern Gateway. Sadly, this development has already been scaled back by the developers themselves. I say sadly, because in its original design it would have been a fantastic fit for housing, shops, offices, entertainment and stadium. There was even an artists mock up of an entrance to a large venue from a street level.
Another site which might have been considered, although not the best, is at Wolvercote. The old paper mill is now ready to start with planning passed and good to go. This is an area within green belt protection.
I've posted this before but, just to bring to people's attention again, here is the link:
2017 Green Belt study