OK I live in a terrace of 6 houses. For ages I complained to my neighbours about their kitchen overflowing down my path. A couple of weeks before Easter it stunk and my neighbour brought home some drain rods couldn't clear it. So he opened the drain cover and the culprit was the supposedly flushable toilet wipes. He bagged them up. So basically I d had sewage running down my path into the next house!
Next morning the house next door has sewage by the back door. Frantic neighbour looking up her insurance. I'd checked the previous eve that shared drains were the responsibility of the water company. They come out with cameras and pressure nets to clear it. They try to find the drain in the road, they decide the main drain goes through next door. I remind my neighbour that she has a drain under the gravel. The gravel is cleared, they jet wash but aren't happy they can follow the drain. They will send an engineer but call them in case if problems.
Within 2 weeks sewage is coming up from the outside drain lucky me I'm a foot higher. The workmen are there from 3 to midnight. No luck. The following morning two people arrive, they decide they cannot try to flush without a pump. My garden has a large piece of old allotments where there is a path through to a road They agree that they can get the tanker parked there and run 65 metres of 6inch pump through the lane across the old allotment path down my garden and into next door. They clean up and jet wash Cameras go down the pipes, but no luck. They decide to dig up my neighbours front garden to jet wash from there no luck. By this time engineers come out. Its decided they need a more powerful pump so another tanker arrives. The tanker will remain on site to pump out until the blockage is cleared. By Friday they decide they have to dig up my neighbours kitchen and the pipe is under the floor in her house. They are moved into a hotel for a week. It isn't till Sat afternoon the fatberg is jet washed out, 4 days later, it goes rattling up the pipes in my garden. The pipes in next doors are replaced and the floor filled in. As there was an open sewer in the kitchen a tram us sent in to deep clean.
The engineers then proceed to dig up the road to put s manhole cover in the road for future access. So 10 days from start to finish because people don't respect the three Ps - pee, poo and paper (toilet papet)
Fat, J cloths, wet wipes!