Tis very simple. Pat's won't get to build anything over the Camac. For Richer to be developed to any kind of acceptable level it would involve turning the playing surface, Mr K to donate some of his current asbestos-roofed shed site to ground building. Use whatever ground the club own on the far side of the camac for some amenity use or as a planning gain for buidlding whatever hgh density flagship devlopment he has in mind.
There would maybe be enough room to build some kind of stadium similar to this 8k capacity gem from the Basque country.
http://www.barakaldocf.com/instalaciones
to do this would require 40-50M in my opinon given the site constraints and the civil engineering work, an unimaginable act of altruism. If he does it I will tip my hat to him, much easier to throw something up for 20M out in the burbs.
the rezoning of his asbestos sheds from z6 to z14/z1 is hardly the news of the century.