But for Severn Trent Drains, the job wasn't over. They weren't historians or detectives. They were drainage engineers. And the drain was still blocked.
Dave fed the tethered crawler—a camera on wheeled tracks—into the gully. The screen flickered to life. For the first ten metres, it was standard stuff: fractured clay pipes, a few hairline roots, a dead pigeon. But at fifteen metres, the tunnel opened up. drain company wolverhampton
"Ever heard of a breathing floor?"