Warded to Susan
I haven't put everything onto a map yet, but I think we're looking at central London. All the locations I've been given seem to have a WC postcode. I wouldn't be surprised if this was some sort of Knockturn remnant.
People who have views like this are people who deserve some really nasty hexes. Luckily, I know a few. (What can I say? I have an affinity for canines.)
Sounds like a plan. Bring in whoever you want. I wouldn't consider myself much of an investigator, so any help is appreciated.