And so the green is pitted against the grey in a fight that leads nowhere.
The Grey Belt puts the Green Belt on probation. 
Is it all really that green? Where is it underperforming? Could we release chunks of it here and there?
As boroughs undertake a somewhat tedious scrutiny into every inch of it…
As landowners snatch the opportunity to demonstrate the grey-ness of their land…
The push to intensify and optimise generates a sea of planning applications and appeals that promises to litter the land with low-quality development.
This empowers the nay-sayers, sparks negativity, and galvanises nothing inspiring. 
In the absence of a vision to tie it all together, that is. 
Beyond the simplified, binary discussion of green vs. grey lies an opportunity to adopt a joined up, strategic vision that spans administrative boundaries, reaching across and beyond the M25.
This is London's next chapter of evolution. Playfully, it is an opportunity to evolve Cedric Price’s metaphor of "The City as an Egg" towards the concept of "The City as Shakshuka," where growth is layered, integrated, and flavoursome!