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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.

        • a group volunteers in waders walking through a shallow river on a sunny day using sticks to help them balance
        • Working together to improve our rivers

          We deliver a wide range of projects across London and the Thames Basin to restore, protect and improve our rivers for people and wildlife. Explore some of our key projects and programmes

        • 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.

        • Working together to improve our rivers
          We deliver a wide range of projects across London and the Thames Basin to restore, protect and improve our rivers for people and wildlife. Explore some of our key projects and programmes.

        • 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 – PROJECT COMPLETED
          • Community Action for the Cut – PROJECT COMPLETED
          • Greenwich Natural Flood Management (NFM) Project
          • Marsh Dykes & Thamesmead Catchment Improvement Project
          • Oxford Rivers Project
          • Quaggy Habitats – Capel Manor Project – PROJECT COMPLETED
          • Queensmead Recreation Ground, London Borough of Bromley
          • Rewilding the Rom – PROJECT COMPLETED
          • River Beck Restoration
          • River Biodiversity Net Gain Units
          • Road run-off
          • South Essex Catchment Partnership
          • The River Ravensbourne and Glassmill Pond – PROJECT COMPLETED
        • 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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London Rivers Week 2026

London Rivers Week 2026: Firs Farm Wetlands

Join us for a fun-filled, free family day celebrating quality rivers for all! Explore the great outdoors with: Drop-ins welcome. Just turn up. Wetlands tour…

London Rivers Week 2026: Photography Competition Awards and Film Screening

Join us for our London River’s Week Photography Competition awards. We will also be screening the short film We the Lea | Pollution, People and…

London Rivers Week 2026: Understanding Urban Rivers training and river wade

Would you like to be able to identify the signs of a healthy river? Join us as we journey through the evolution of a river,…

Londoners encouraged to discover their local rivers as festival returns

Londoners are being encouraged to reconnect with their local rivers as part of this year’s London Rivers Week 2026, marking a decade of connecting people…

Published 11th May 202621st May 2026 Published in Media Releases

London Rivers Week 2026 Webinar: Stories of the Thames – Life, Memory & Community in East London

Join us for a special free London Rivers Week 2026 webinar, where three local experts will bring to life powerful stories from the past and…

London Rivers Week 2026: Honouring Mama Osun

REGISTER HERE! We enjoyed it so much last year that the Annual Osun River Ritual organisers and Thames21 are again inviting you to this special…

London Rivers Week 2026: River Beck

How well do you know your local river? Join Thames21 in Harvington Woods for a free event as part of London Rivers Week to get…

London Rivers Week 2026: Morden Hall Park Family Craft and River Dipping Experience Day

Celebrate London Rivers Week with a FREE fun, hands-on morning by the River Wandle! Join Thames21, the National Trust and its Urban Rangers, and creative…

London Rivers Week 2026: Guided Walk Exploring the Industrial History of the River Wandle [FULLY BOOKED]

Led by John Sheridan of the Wandle Industrial Museum, this FREE event starts at Mitcham, lets you view sections of the River Wandle, and finishes…

Latest News

  • Rare wildlife discovered in River Ching and River Lea surveys led by local communities
    Environmental charity Thames21 has funded a survey revealing a diverse range of wildlife in the River Ching, including the critically endangered European eel and the unusual Peach Blossom jellyfish. The findings also highlight evidence of wastewater pollution and barriers that restrict fish movement....

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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

Contact us

Satellite Office

Satellite Office: 

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

Contact us

Welsh Harp Centre

Welsh Harp Environmental Education Centre: 

Birchen Grove,
LONDON NW9 8RY

Contact us


Registered Charity number: 1103997

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