Thanks for that, didn't know about the 25 year thing.
I'm in Stockton, and our new build has a management company section, and ~30 of us are being charged £250 a year to "look after" about 10m x 3m of grass, it's ludicrous. It's like 8k per year, and the daft thing is in two years the area has never even been touched, we're sure the management company have never even seen it. The bloke who lives near it ends up cutting it every few weeks in summer as it looks a mess otherwise, and there's also a big delve in in where someone drove over it early in the builds.
If it's 8k per year to look after that, and that's cheaper than the council option, then I dread to thing what looking after something more difficult would cost, and a much larger area.