Six in ten people are confused about what they can and can’t put down the loo or sink.

New research by Thames Water says this is causing more than 74,000 blockages annually at a cost of £40 million.

Wet wipes are one of the biggest causes of “fatbergs” which are congealed mounds of non-biodegradable waste.

Liz Gyekye is part of charity Thames 21 which has just cleared the notorious “wet wipe island” in Barnes.