Drain & sewer clearance
Responsibility depends on whether the pipe serves only your property or more than one; water companies publish guidance on this.

What this covers
Clearing blockages in private drains and advising when the water company is responsible for a public sewer.
Do this first
- Keep clear of sewage and electrics near standing water.
- Avoid pouring more water into a blocked fitting.
- Note whether upstairs and downstairs drains are affected and photograph any overflow if safe.