180 tonnes of congealed wet wipes – the equivalent to the weight of 15 double decker London buses – are being removed from the River Thames by the Port of London Authority, in collaboration with Thames Water.

Environmental charity Thames21 and its volunteers have already collected more than 140,000 wet wipes along the Thames and campaigned to clean up the site

Work has now started on the mass excavation of London’s “Wet Wipe Island” project to further improve the quality of the River Thames - the month-long operation is the country’s first mass wet wipe removal project of its kind.

Led and co-ordinated by the Port of London Authority in collaboration with Thames Water, the operation is removing an estimated 180 tonnes of congealed wet wipes that has formed the island along a 250-metre stretch of the tidal Thames near Hammersmith Bridge. It is expected to take up to a month to complete.

The island, which is about the size of two tennis courts, has changed the course of the river and potentially harmed the aquatic wildlife and ecology in the area.

To date, efforts to clean wet wipes from the unique natural environment have relied on people removing them by hand.

Inspired by the work of volunteers at Thames 21, the PLA decided to take a lead in co-ordinating larger scale action to remove this unsightly and harmful mess.

The UK’s biggest port, which is responsible for protecting and improving the tidal Thames, commissioned an independent ecological study of the site. This helped inform and develop an environmentally responsible plan to use a mechanical excavator to remove the wet wipes on a mass scale.

Thames21 and its volunteers have been monitoring the island since 2017. Their data and research have played a vital role in raising awareness of how wet wipes containing plastic can degrade the environment and harm wildlife. Their data has also influenced Government policy. It comes after the Government recently published draft legislation to ban wet wipes containing plastic.

Thames 21’s work, alongside expert insights from the PLA’s own hydrography and environmental teams, has proved invaluable in planning the mass removal project.

Thames Water recently announced a further £1.8 billion investment to improve river health across London, and last year connected its £4.6 billion Thames Tideway Tunnel to support the reduction of sewage discharges into the tidal Thames by 95%.

Port of London Authority’s Director of Sustainability, Grace Rawnsley, said:

“For too long, ‘Wet Wipe Island’ in Hammersmith has been a source of environmental harm and an embarrassment to the capital. Inspired by the work of volunteers at Thames 21, we decided to take a lead in co-ordinating action to remove this unsightly and harmful mess.

“This is the first time anyone has sought to execute a mass, mechanical removal of wet wipes in this way.

“We want a cleaner, healthier tidal Thames and will continue to work with all interested parties to secure that. And we will continue to bring innovation and investment to help the world’s greatest river thrive.”

Thames Water’s Head of Tideway Integration Group, John Sullivan, said:

“Our purpose is to deliver life's essential service, so our customers, communities and the environment can thrive. We are pleased to collaborate with the PLA and Thames21 to remove this mass of wet wipes. For us it is a visible reminder of the damage caused by putting the wrong things down the toilet because flushing something non-biodegradable like a wet wipe doesn’t just make it disappear.

“Blockages caused by wipes are a leading cause of pollution and we remove an estimated 3.8 billion wipes from our network each year.”

Chris Coode, CEO at Thames21, described the removal as a vital move which would reduce the introduction of microplastics into the environment from the site and a crucial step towards protecting the health of the River Thames and its wildlife.

He commented:

“Thames21 and its dedicated volunteers have been building evidence for eight years. We want to give our volunteers a huge shout-out for their persistence. This has been a massive piece of work!

“Thames21 has been pushing for a ban on plastics in wet wipes. However, we would like to see more systemic change to tackle the issue of plastics entering the environment via wet wipes and other sanitary waste.

“We want producers to get serious about plastic-free alternatives to wet wipes. We ask water companies to increase their investment in screening to prevent wet wipes and other sanitary waste which contains plastic entering the environment. We’d also like to see a step-change in their investments in upgrading sewage infrastructure to prevent overflows.”