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        • Empower communities to look after their local rivers:

          We mobilise thousands of volunteers every year, working along the riverbank to transform neglected rivers into areas that everyone can use and enjoy.

        • Restore the capital’s network of rivers through the power of nature

          We work to clean and green the capital’s 400-mile network of rivers through innovative solutions to boost biodiversity and restore nature.

        • Build a climate resilient London

          We help to build more engaged communities and healthier rivers better able to adapt to the impacts of climate change, now and into the future.

        • Empower communities to look after their local rivers
          We mobilise thousands of volunteers every year, working along the riverbank to transform neglected rivers into areas that everyone can use and enjoy.

        • Restore the capital’s network of rivers through the power of nature
          We work to clean and green the capital’s 400-mile network of rivers through innovative solutions to boost biodiversity and restore nature.

        • Build a climate resilient London
          We help to build more engaged communities and healthier rivers better able to adapt to the impacts of climate change, now and into the future.

        • Improving Rivers
          • Backwater restoration in the Maidenhead to Teddington catchment
          • Bathing waters – Reclaim Our Rivers
          • Cator Park, London Borough of Bromley
          • Understanding our rivers through connecting communities to waterways – Catchment Partnerships
          • Chinbrook Meadows Wetlands
          • Community Action for the Cut
          • Greenwich Natural Flood Management (NFM) Project
          • Marsh Dykes & Thamesmead Catchment Improvement Project
          • Oxford Rivers Project
          • Quaggy Habitats – Capel Manor Project
          • Queensmead Recreation Ground, London Borough of Bromley
          • Rewilding the Rom
          • River Beck Restoration
          • River Biodiversity Net Gain Units
          • Road run-off
          • South Essex Catchment Partnership
          • The River Ravensbourne and Glassmill Pond
        • Connecting Communities
          • Beckenham Place Park East – River Ravensbourne
          • Become a Citizen Scientist
          • Chestnuts Field
          • EMPOWER Rivers
          • Plasticblitz
          • Action for Silk Stream
          • Thames Connections
          • Thames River Watch
          • The Roding Rises
        • Education and Training
          • Citizen Science
            • Leading Action for Healthy Rivers: Thames21’s flagship training course
            • Welsh Harp Environmental Education Centre
        • What we do
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Plastic Pollution

Citizen science volunteers ready to contribute to our Plastic Free Mersey project

  Thames21 is proud to announce that its first wave of volunteers have successfully completed their training to be citizen scientists on the Plastic Free…

Published 14th October 202121st October 2021 Published in Blog

Thames21 raises alarm about river sewage crisis

Thames21 helped raise the alarm about the UK’s river sewage pollution crisis last week – by contributing to a hard-hitting BBC documentary. Thames21 opened last…

Published 19th April 202119th April 2021 Published in Latest news, Thames 21

Latest river Thames survey confirms COVID-19 plastic impact

COVID-19 driving increase in single-use plastic pollution Date of release: 18 December 2020 London’s largest mass census of river plastic, the annual Thames River Watch…

Published 21st December 20205th January 2021 Published in Latest news, Media Releases

When jet lag helped save a cygnet

By Helen Stoddard – Thames21 Volunteer Helen Stoddard is part of Thames21’s citizen science army – a Thames River Watch volunteer. She recounts the time…

Published 25th August 202025th August 2020 Published in Blog

Hollywood star Zac Efron joins forces with Thames21 to highlight London’s plastic waste crisis

American actor and singer Zac Efron highlights the huge issue of London’s plastic waste problem as part of a new series on Netflix airing in…

Published 8th July 20206th February 2023 Published in Latest news

Coronavirus Plastic Pollution: what we can do about it

By Jo Pike – Communications Volunteer at Thames21 Jo Pike is our newest Thames21 volunteer, supporting the ever-busy comms department. She works part-time in a…

Published 30th June 202015th July 2020 Published in Blog

Precious Thames saltmarsh bearing brunt of capital’s plastic tide, latest pollution data finds

Thames21 calls for tougher action on five key plastic items to tackle two-thirds of entire Thames plastic pollution An analysis of citizen science surveys conducted…

Published 30th June 20202nd July 2020 Published in Media Releases

Thriving during lockdown: we’ll bring river inspiration to you

We know how much you love your rivers, and how much you’re missing them during this lockdown. Suddenly everyone is appreciating our blue-green spaces like…

Published 5th May 20205th May 2020 Published in Latest news, Thames 21

All March, April & May events postponed due to coronavirus

In light of the latest government guidance, Thames21 is postponing all our March, April and May events.  We are working as usual, but not from…

Published 17th March 202023rd March 2020 Published in Latest news

More than 27 000 single-use plastic bottles removed from the Thames in past 12 months

Environmental groups call for action following Thames21’s Big Bottle Count Date of release: 28 October 2019 London’s largest mass census of river plastic, the annual…

Published 28th October 201918th February 2020 Published in Latest news, Media Releases

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  • London Rivers Week 2026 Photography Competition
    To mark London Rivers Week 2026, Thames21 is launching a photography competition celebrating the vital role that rivers play in the life of our city. The competition aims to highlight...
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    Thames21
    THAMES21

    Address

    Main Office location (& deliveries)

    The City of London,
    Guildhall,
    Aldermanbury Street,
    LONDON EC2V 7HH

    Postal Address

    The City of London,
    Guildhall,
    PO Box 270,
    LONDON EC2P 2EJ

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    Satellite Office

    Satellite Office: 

    The Lock Office,
    Bow Locks,
    Navigation Road (off Gillender Street),
    LONDON E3 3JY

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    Registered Charity number: 1103997

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