If you tip hot fat down your kitchen sink or wet wipes down the toilet, this is what happens.
There was fat chance of any waste water flowing down the sewer pipe under Shepherd’s Bush Road, west London.
For this ‘fatberg’ was the length of a Boeing 747 and consisted of congealed fat, wet wipes, food, tennis balls and even planks of wood.
It caused flooding inside nearby homes and took Thames Water workers four days to clear.
Using high-powered jets, the watercourse was cleared on Friday.
Dave Dennis, Thames Water sewer operations manager, said: ‘We spend £12million a year tackling blockages, most of them formed because people have tipped cooking fats down the drain and wet wipes down the loo.
The sewers serve an important purpose, they are not an abyss for household rubbish.’