I think it is a very common misapprehension that the public have of what NH plans are for. They are for making land available for building, but sadly, many think it is a good way of preventing building. Even if you specify sites for building, there is nothing to prevent a developer charging in after the fact, and deciding to build on some green and pleasant land you thought was safe. If the NH plan is silent on the matter of that land, it means it's up for grabs. (A small phrase in the NPPF gives the game away, but I can't recall the relevant para at the moment, but see the Fontwell Park plan iirc). The only way to resist an application is to put layers of protection on it. No coalescence, green belt, designated green space, landscape assessments, wildlife park & corridors, ancient woodland designations, ACV etc etc. The only true way of preventing a developer from building on some land is to buy it and not sell out to the builders - needs a deep pocket though:-)