Skip to content
logo
  • logo
  • About us
        • About us
        • Contact Us
        • Jobs & Volunteer Positions
        • Our Funders
        • Equality, diversity and inclusion
        • Trustees
  • What we do
        • 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
  • News
  • London Rivers Week
  • Get Involved
        • Volunteer With Us
        • Corporate Team Days
        • Get Trained
        • London Rivers Week 2026 Photography Competition
  • Donate now

Environment Agency

Obituary of Celia Hensman MBE: Thames21 founder

Celia Hensman was a woman of great charm and conviction, who used her formidable intelligence to create lasting, positive change for people and the natural…

Published 6th January 20215th February 2021 Published in Latest news

Londoners urged to take back their rivers during London Rivers Week 2018

‘Massively increased opportunities’ for Londoners to explore and protect their rivers through collecting key data and joining clean up events Saturday 23 JUNE – Sunday…

Published 18th June 201818th June 2018 Published in Media Releases, Thames 21

Faulty drains threaten Thames water quality

Date of Release: Wednesday 6 December 2017 Londoners urged to check plumbing as signs of contamination found in almost one-third of outfalls across capital Raw…

Published 6th December 2017 Published in Media Releases

Thames21 celebrates its volunteers at annual reception

“Corporate volunteering is about community action not just sponsorship” a key Thames21 partner told the charity’s annual reception on Thursday evening. Clyde Muir, Vice President,…

Published 13th October 201729th November 2020 Published in Latest news

Great River Rescue launched on Isle of Dogs – now register your event for October!

Volunteers cleared litter from Millwall Draw Dock on the Isle of Dogs on World Rivers Day on Sunday to launch the Great River Rescue campaign….

Published 25th September 2017 Published in Latest news

Volunteer for new Outfall Safaris on the Ravensbourne & Ingrebourne

Would you like to help identify where misconnected drains are polluting rivers? Thames21, under the guidance of the Zoological Society of London, is offering the public the chance to…

Published 26th July 201716th October 2017 Published in Latest news

Leonie Cooper opens London Rivers Week at Ladywell Fields, Lewisham

Nordic walking, river dipping and wading in the Ravensbourne were among the attractions at the launch of London Rivers Week on Sunday at Ladywell Fields,…

Published 26th June 201716th October 2017 Published in Latest news

Londoners urged to explore the capital’s forgotten rivers during London Rivers Week

Escape city stress by exploring ‘66 Shards-worth’ of newly rewilded rivers Monday 26 JUNE – Sunday 2 JULY London, UK – 13 June 2017: Londoners…

Published 14th June 201716th October 2017 Published in Media Releases

Outfall safaris are tackling river pollution – and you can help as a citizen scientist!

Joe Pecorelli, the Zoological Society of London’s Europe Conservation Project Manager, tells us about work running across the capital to prioritise and map sources of…

Published 2nd May 201713th January 2022 Published in Blog

Thames21 volunteers embrace Great British Spring Clean

Hundreds of volunteers helped Thames21 at eight events the charity put on for the Great British Spring Clean last weekend, starting with 50 people who…

Published 6th March 201713th January 2022 Published in Latest news

Posts navigation

Older posts

Latest News

  • 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...
  • Events Diary

    Upcoming Events

    Notice
    There are no upcoming events.

    Follow Us

    Follow us on Facebook
    Follow us on Twitter
    Follow us on Instagram

    Donate

    Donate now

    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

    Contact us

    Satellite Office

    Satellite Office: 

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

    Contact us


    Registered Charity number: 1103997

    • Home
    • Get Involved
    • Support Us
    • Latest news
    • Sign up for our e-news!
    • Media enquiries
    • Publications
    • Privacy Policy