I have this on my current freehold property and it's a bit of a pain.
Initially the development was handled by a management company called Chamonix. They seemed OK, fees stayed about the same each year.
Then they got bought out by First Port, who are greedy. Fees have since gone up. The itemised bill they send out is largely fees to them, they include a £1k per year charge to the estate for "General Maintenance" but what this actually means is anyone's guess.
Paying £325 this year, so it's creeping up. Originally was more like £225.