Each year we spend around £5million unblocking sewers. Items we've found in sewers over the years have included mattresses, bicycles, fridges, shopping trolleys, false teeth and tonnes of fat!
More than two thirds of all blockages are caused by people putting things down the sewers that shouldn't be there.
If a sewer gets even partially blocked, wastewater may not flow freely and can cause the pipes to overflow, especially during heavy rainfall.
Find out more on how to avoid blockages to help your sewage network.