From what you've said about your neighbours...Come home yesterday to find a letter. Apparently there's an infestation of rats in 'neighbouring properties' but don't know whose as none of the people I've asked nearby know anything about it. I've spent ages in my little garden this couple of years and in the last few weeks been chopping back a lot of greenery and pulling up old plants but not seen or heard any sign of rats. The biggest problem for me has been next doors 4 cats using my garden as a litter tray, so I would have thought they would be a good deterrent to any rats, but I've got to stop feeding my lovely sparrows to make sure the sunflower hearts aren't attracting rats.
I love watching them in my tree so sad about that.