These signs do not identify the exact cause on their own. Tell us what you have observed so the right assessment can be discussed.
A repeat blockage does not necessarily mean the first clearance was unsuccessful. Material may build up again, or a defect in the pipe may continue to catch debris. A CCTV survey can show the visible condition of accessible sections and help answer whether further work is needed.
Hampshire Drain Expert’s camera-survey page explains that an inspection can reveal blockages, roots, deposits, cracks and displaced joints. It also makes clear that findings depend on what the camera can see.
Hampshire Drain Expert primarily presents its service coverage as Hampshire. If you need help at a London property, provide your postcode and a short description of the blockage. The team can confirm whether it can attend your location and discuss the appropriate next step. This page does not imply that the company has a London office or London-based engineers.
If wastewater is backing up, avoid using affected fixtures while you seek advice. Keep people away from any contaminated water and do not enter a drain or inspection chamber yourself.