Thank you for your comments and I will bear your suggestion in mind. The drains aren't shared though. It's only their bathroom that uses them. That's what I have found so strange.
We bought a property with a flying freehold belonging to next door. They have a window over our dining room. On moving in we discovered they have a bathroom in this room and their toilet downpipe and the bath, sink and shower waste pipe (which is an open drain) are outside our door to the yard and i...
