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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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        • London Rivers Week 2026 Photography Competition Winners Video
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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

  • Thames21’s response to Thames Water’s pollution incidents
    Recent figures published in The Times have shown that Thames Water was responsible for almost a third of the water sector’s most harmful pollution incidents in 2025. A Thames21 spokesman said: “The scale of serious pollution incidents linked to Thames Water is deeply...

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Thames21
THAMES21

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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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