I think I said that when I said they don't believe in property rights. :)
NIMBYs basically use property rights to their logical end. FWIW California is trying to fight this with laws that remove the rights of NIMBYs and their worst behaviors.
Ah, in the UK the NIMBYs don't just have property rights on their side, to stop things getting built.
There are also 'green belt' laws (which ban construction on land in a ring around many cities) and there are 'environmental impact' laws (which require you to check for things like rare species) and there are 'areas of outstanding natural beauty' and national parks (where it's a lot harder to build things) and local government 'planning permission' rules (which have pretty broad powers to block development and dictate what type of development is allowed) and rules for 'nationally significant infrastructure projects' (giving national government a big say on things like airports) and also 'judicial review' for decisions that don't go your way.
And almost all of these still apply, even if the government themselves are performing the construction.
In the UK, just because you own some land, doesn't mean you're allowed to build on it.