It is about time that there was a legal requirement for humane organisations to be consulted as a first course of action. For the benefit of wildlife and the environment.
If they stopped trying to poison the foxes and rats, the foxes would do their job and get rid of the rats. I don't understand why sites today can't build with nature in mind, knowing it shares the land. And if they are worried about wildlife due to wildlife feeders (instead of taunting them with dead animals), they need to provide talks by registered wildlife charities on the most appropriate and suitable ways to support wildlife, without creating wildlife conflict.
For rats to be there in the first place, the ground has a serious issue with having a food supply. I am not sure how more food, solves the problem behaviour. Poisoning that food supply is clearly not working for them; and it is such an indiscriminate method of lethal control.