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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
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          • Citizen Science
            • Leading Action for Healthy Rivers: Thames21’s flagship training course
            • Welsh Harp Environmental Education Centre
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Harrow

Thames21 provides new technology for communities to help beat flooding

Press Release Residents of four London boroughs provided with cutting edge devices to monitor flood defences London, UK –  21 January 2020: Residents in Enfield,…

Published 13th February 202013th February 2020 Published in Latest news, Media Releases

Defra gives Thames21 Natural Flood Management projects £200,000 boost

Thames21 and partners have received £200,000 for four new Natural Flood Management projects in North London, from the Department for the Environment, Food and Rural…

Published 20th October 20171st November 2017 Published in Latest news

Residents delighted with Stanmore Marsh restoration

School children, residents and local dignitaries all came together to officially open Stanmore Marsh on Wednesday June 28. Approximately 120 people thronged the Marsh Lane…

Published 30th June 201716th October 2017 Published in Latest news

Huge new green space for Harrow: Stanmore Marsh Wetlands officially opens after restoration

Free fun community activities on June 28 as part of London Rivers Week Date of release: June 16 EVENT DATE: Wednesday June 28 2pm-3.30pm Stanmore…

Published 19th June 20178th June 2018 Published in Media Releases

Book your half-term session at the Welsh Harp Centre with Thames21

Book your children in now for a great day out during the summer half-term! We have sessions at the Welsh Harp Environmental Education Centre, in Birchen…

Published 18th May 20174th September 2017 Published in Latest news

Flagship Welsh Harp Centre relaunches with community fun day on June 4

Community Fun Day: 4 June Time: 11-4 pm Location: Birchen Grove, London NW9 8RY A five-hectare nature oasis in north-west London is throwing its doors…

Published 15th May 201716th October 2017 Published in Media Releases

Teachers and youth group leaders invited to experience Welsh Harp Education Centre by the camp fire

North West London’s flagship environmental education venue is throwing open its doors for a special open evening on Thursday April 27th for teachers, youth group…

Published 10th April 20172nd October 2017 Published in Media Releases

Send pupils back to Stone Age in our new Key Stage 2 session

Thames21 has an exciting new Key Stage 2 session available at our Welsh Harp Environmental Education Centre which will provide a fantastic day of outdoor learning for…

Published 8th March 201729th September 2017 Published in Latest news

Volunteers smash Thames21 bulb planting target at Stanmore Marsh

Date of release: December 6, 2016 More than 50 local volunteers helped smash the target to plant 10,000 bulbs at Stanmore Marsh, Harrow, on Saturday 26th…

Published 6th December 20168th June 2018 Published in Media Releases

Volunteers wanted to help plant 10,000 bulbs to brighten up Stanmore Marsh in time for spring

Bulb planting at one of the sessions this autumn Volunteers are needed to help Thames21 finish planting 10,000 bulbs which will bring a kaleidoscope of…

Published 14th November 201614th November 2016 Published in Media Releases

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...
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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


    Registered Charity number: 1103997

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