Brilliant idea. I had seen them, perhaps, moving to Wapping police station(if it still has a pier) or maybe re-starting the old Charing Cross nick which was on a pier under Waterloo bridge. (“Only floating police station in the world” commentary on Golden Spray II pleasure launch 50s/60s). The old Necropolis station would be better though. Just think of its effect on Maggie Armitage with all her witchiness!