How do I know if it is my drain that is blocked?
If your drain is blocked you will usually know because your waste will stop going away when you flush the toilet, or gullies outside will overflow. There will also probably be a smell.
Who is responsible?
Drains are pipes which carry waste from a single property. These become lateral drains when they extend beyond the individual property boundary.Sewers are pipes which carry waste from more than one property.
The property owner is responsible for the drain that serves their property until it crosses the boundary of their property. South West Water is responsible for lateral drains and sewers.