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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
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          • EMPOWER Rivers
          • Plasticblitz
          • Action for Silk Stream
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          • Thames River Watch
          • The Roding Rises
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            • Welsh Harp Environmental Education Centre
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25 events found.

Events

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Today
  • May 2026

  • Thu 28
    London Rivers Week 2026 Kyd Brook Walk

    London Rivers Week 2026: The Kyd Brook: Living alongside a suburban river 1920s-2020s. A walk through Petts Wood [FULLY BOOKED – Waitlist Available]

    May 28 @ 6:00 pm - 8:00 pm

    Join urban sociologists Emma Jackson and Louise Rondel and local historians Mel Wright and Andrea Stevens for a FREE guided, London Rivers Week 2026 walk...

  • Thu 28

    London Rivers Week 2026: Poetry Open Mic Night – Rivers Edition

    May 28 @ 6:30 pm - 9:30 pm
    Putney Public Library

    Join Poets in Putney for a free poetry session celebrating London Rivers Week 2026! The event will be held at The Hall, Putney Public Library...

    Free
  • Fri 29

    London Rivers Week 2026: Action for Silk Stream – Wildflower Identification Workshop [FULLY BOOKED]

    May 29 @ 10:00 am - 1:00 pm
    Lyndhurst Park Edgware

    Join Action for Silk Stream on a free Beginners Botanical Walk as part of London Rivers Week. We will identify wildflowers and plants growing along...

  • Fri 29

    London Rivers Week 2026: Perivale Park Litter Pick

    May 29 @ 10:00 am - 2:00 pm
    Pear Tree Bistro Stockdove Way, Greenford

    Join Thames21 for a free community litter‑picking session along the River Brent in Perivale Park as part of London Rivers Week 2026! This hands‑on event...

    Free
  • Fri 29

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

    May 29 @ 10:00 am - 4:00 pm
    Brookmill Park Brookmill Road, Deptford, London, United Kingdom

    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,...

  • Sat 30

    London Rivers Week 2026: River Roding guided walk (Redbridge to Ray Park)

    May 30 @ 9:30 am - 11:30 am
    Redbridge Tube Station Eastern Avenue , Ilford, Essex, United Kingdom

    Join the River Roding Trust on a 3.5-mile free guided walk up London's 3rd longest river, from Redbridge to Ray Park, as part of London...

    Free
  • Sat 30

    London Rivers Week 2026: The East London Garden Society Boat Trip [FULLY BOOKED]

    May 30 @ 10:00 am - 5:00 pm
    Three Mills Park, E3 3DU

    Join The East London Garden Society for a boat trip as part of London Rivers Week 2026. Hop on board for a chill boat trip...

    Free
  • Sat 30

    London Rivers Week 2026: Source to Sea: Walking the Ravensbourne (Part 2)

    May 30 @ 10:30 am - 1:30 pm
    Ravensbourne Rail Station

    To mark London Rivers Week, join Creekside Discovery Centre on this special two-part free walk following the Ravensbourne River from its source to where it...

    Free
  • Sat 30

    London Rivers Week 2026: Thames Tideway walk – Vauxhall Bridge to Blackfriars (two sessions) [FULLY BOOKED]

    May 30 @ 11:00 am - 1:00 pm London Rivers Week 2026: Thames Tideway walk – Blackfriars to Vauxhall Bridge (two sessions)
    Bazalgette Embankment

    Get your walking boots on and join this FREE guided walk along three public realm sites of the Thames Tideway Tunnel - their design, engineering...

  • Sat 30

    London Rivers Week 2026: Firs Farm Wetlands

    May 30 @ 11:00 am - 1:00 pm
    Firs Farm Community Hub Playing Fields, Firs Ln, London

    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...

  • Sat 30

    London Rivers Week 2026: Coming into {{Contact}} with a River you cannot {{Touch}}

    May 30 @ 11:00 am - May 31 @ 5:00 pm
    Metroland Cultures 91 Kilburn Square

    How can we come into contact with rivers we cannot touch? Join artist, researcher and London National Park City Ranger Becky Lyon for a free...

    Free
  • Sat 30

    London Rivers Week 2026: Make Like Morris – A Wandle Blooms Linoprint Workshop

    May 30 @ 12:00 pm - 3:00 pm
    Poulter Park 131 Peterborough Road, London

    Channel William Morris by the River Wandle! Carve & print your own floral tile with South East Rivers Trust at this free outdoor workshop for...

    Free
  • Sat 30

    London Rivers Week 2026: River Roding guided walk (Ray Park to Debden)

    May 30 @ 12:00 pm - 3:00 pm
    James Leal Centre James Leal Centre, Ray House, Woodford, Wells, Woodford Green, London, United Kingdom

    Celebrate London Rivers Week by joining the River Roding Trust on one (or more!) of their free guided walks along some beautiful stretches of London's...

    Free
  • Sat 30

    London Rivers Week 2026: Thames Tideway walk – Blackfriars to Vauxhall Bridge (two sessions) [FULLY BOOKED]

    May 30 @ 2:00 pm - 4:00 pm London Rivers Week 2026: Thames Tideway walk – Blackfriars to Vauxhall Bridge (two sessions)
    Bazalgette Embankment

    Get your walking boots on and join this FREE guided walk along three public realm sites of the Thames Tideway Tunnel - their design, engineering...

  • Sat 30

    London Rivers Week 2026: Barnes Common Riverside Walk [FULLY BOOKED – WAITLIST AVAILABLE]

    May 30 @ 2:00 pm - 4:00 pm
    Barnes Bridge

    Join Barnes Common Limited for a free riverside walk as part of London Rivers Week 2026. A walk along the Thames Path via Leg O'Mutton...

    Free
  • Sun 31

    London Rivers Week 2026: Chiswick Eyot Conservation (FULLY BOOKED)

    May 31 @ 9:00 am - 1:00 pm Chiswick Eyot Conservation
    Chiswick Eyot, The Mall, London W4 2PR Chiswick Eyot, London, United Kingdom

    Thames21 is working to restore Chiswick Eyot. BOOK HERE Information about the day: Volunteer and help us to stabilise the island from further erosion and...

  • Sun 31

    London Rivers Week 2026: Introduction to MoRPh CSci training event [FULLY BOOKED]

    May 31 @ 9:30 am - 5:00 pm
    4th Ruislip Scout Hut West End Road

    As part of London Rivers Week, Cartographer are hosting a free, open, in-person 'Introduction to MoRPh' training. This one-day training course will teach you how...

    Free
  • Sun 31

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

    May 31 @ 10:00 am - 12:00 pm
    Morden Hall Park Morden Hall Rd, Morden

    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...

  • Sun 31

    London Rivers Week 2026: Brown Girls Summit Walk

    May 31 @ 10:00 am - 1:00 pm
    Bishops Park Bishop's Ave

    CLICK HERE TO REGISTER Join Brown Girls Summit for a free women-only guided walk as part of London Rivers Week 2026. Brown Girls Summit is...

  • Sun 31

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

    May 31 @ 12:00 pm - 1:30 pm
    Mitcham Tram Stop London Road, London

    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...

  • Sun 31

    London Rivers Week 2026: Honouring Mama Osun

    May 31 @ 1:30 pm - 4:00 pm
    Old Swan Wharf at St. Mary's Church, Battersea. St. Mary's Church, Battersea Church Rd,, London, United Kingdom

    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...

  • Sun 31

    London Rivers Week 2026: The Brent Monitoring Network

    May 31 @ 2:00 pm - 5:00 pm
    Meet at the Pitshanger Park Pitshanger Park, London, United Kingdom

    Join Clean Up the River Brent (CURB) to learn more about water quality monitoring systems as part of London Rivers Week. Learn how to build...

    Free
  • June 2026

  • Thu 4

    Post-London Rivers Week 2026: Learning from nature – working with trees to improve rivers [FULLY BOOKED]

    June 4 @ 6:30 pm - 8:00 pm
    Hackney Marshes Centre

    Join Dr Helen Moggridge on a post-London Rivers Week guided walk along the Old Lea, learning how we can use trees in rivers to return...

    Free
  • Fri 5

    River Cray – Balsam Blitz!

    June 5 @ 10:00 am - 2:00 pm

    Join us to help us eradicate Himalayan Balsam from the River Cray (in North Cray) for now and the future! Book Here! Thames21 have been...

  • Mon 8

    River Litter Detectives – Broomhouse Dock

    June 8 @ 2:00 pm - 4:00 pm
    Broomhouse Dock SW6 3EH, Junction of Carnwath Road & Broomhouse Lane, Fulham, United Kingdom

    Book your place here Come along and join Thames21 as a river citizen scientist on the River Thames. We will collect the litter we find...

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Thames21
THAMES21

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Main Office location (& deliveries)

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

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

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

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Registered Charity number: 1103997

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