All our events and activities are open to communities.
Corporate groups, please book with Thames21 using our corporate volunteering page
Calendar of Events
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Dollis Brook – Balsam Blitz
Dollis Brook – Balsam Blitz
This particular event we will be focusing on invasive species removal exclusively. This will involve a fairly long walk, just over 1k in waders along the Dollis Brook so a reasonable level of fitness is required for this event, and isn’t suitable for under 16’s.
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1 event,
Cray River – Balsam Blitz EVENT CANCELLED DUE TO HIGH WATER LEVEL DUE TO RAINS
Cray River – Balsam Blitz EVENT CANCELLED DUE TO HIGH WATER LEVEL DUE TO RAINS
EVENT CANCELLED DUE TO HIGH WATER LEVEL DUE TO RAINS Its that time again... Spring has fully sprung and we have work to do. Thames21...
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2 events,
Big Wet Wipe Count
Big Wet Wipe Count
Book your place here! Help protect the River Thames by measuring the impact of wet wipes deposited on its shores! Join Thames21 to gather crucial...
Thames Road Wetland – Habitat Maintenance
Thames Road Wetland – Habitat Maintenance
This event has been postponed to allow the nesting birds a chance to breed quietly, please join up again for the following events. Volunteering...
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0 events,
2 events,
London Rivers Week 2024: Beverley Brook Guided Walk
London Rivers Week 2024: Beverley Brook Guided Walk
Join the South East Rivers Trust for a guided walk from Richmond Park to Wimbledon Common (and back again!) to learn about the history, ecology...
London Rivers Week 2024: River Wandle Clean Up
London Rivers Week 2024: River Wandle Clean Up
Join South East Rivers Trust at Poulter Park to don waders and enter the Wandle to remove litter and plastic pollution. Rubbish in our rivers...
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2 events,
Dollis Brook Dead Hedging
Dollis Brook Dead Hedging
THAMES21 are removing the outdated toe-boarding from the Dollis Brook along Brook Farm Open Space, and we need volunteer help from the community. There are...
Action for Silk Stream – Wellbeing celebration in Watling Park
Action for Silk Stream – Wellbeing celebration in Watling Park
To mark Mental Health Awareness week, Action for Silk Stream Project, Fit and Active Barnet (FAB) and Meridian Wellbeing are holding an event to get...
2 events,
Chinbrook Meadows Litter Pick
Chinbrook Meadows Litter Pick
The Chinbrook Meadows wetlands have finally been excavated! After years of planning and two months of construction, the wetlands are almost ready. We need your...
Action for Silk Stream – Chandos Park bat walk
Action for Silk Stream – Chandos Park bat walk
Action for Silk Stream is a project that is helping to tackle the effects of climate change by making space for water, reducing flooding and improving...
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1 event,
Leading Action for Healthy Rivers Training – Beckenham Place Park
Leading Action for Healthy Rivers Training – Beckenham Place Park
Training: Leading Action for Healthy Rivers Please note: This course training session is intended for local residents of Beckenham Place Park as a priority. We...
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0 events,
1 event,
Dollis Brook – Balsam Blitz
Dollis Brook – Balsam Blitz
As part of the Thames21 "Dollis Brook Toe-boarding removal Project" we were also successful in securing some funding from Affinity Water to tackle the invasive...
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2 events,
Leading Action for Healthy Rivers Training – Central London
Leading Action for Healthy Rivers Training – Central London
Training: Leading Action for Healthy Rivers Thursday 23rd & Friday 24th May, 2024 We are looking to train future River Action Leaders! Take part in...
River Roding water quality training
River Roding water quality training
Thames21 will be conducting an exciting program of water quality monitoring on the River Roding this summer, and we need citizen scientists to help. We'll...
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2 events,
Cray River – Balsam Blitz
Cray River – Balsam Blitz
Himalayan Balsam, an invasive plant that damages our fragile river systems, it erodes the riverbanks, outcompeting native plants and grows readily in wet condition. Sadly, it has spread quite pervasively down many UK rivers like the Cray in Bexley.
Sands End River Clean Up & Litter Detectives
Sands End River Clean Up & Litter Detectives
Book your place here Do you want to help keep the River Thames clean and healthy? Join Thames21 at Broomhouse Dock on the 25th May...
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1 event,
Gores Brook Introduction & Balsam Removal Event
Gores Brook Introduction & Balsam Removal Event
THAMES21 and Barking & Dagenham Ranger Service are embarking on a project to improve the Gores Brook through Gores Brook Park and we need your...
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1 event,
Action for Silk Stream – Free Half term activities at the Welsh Harp
Action for Silk Stream – Free Half term activities at the Welsh Harp
Let’s Go Wild at Welsh Harp! Come join us and explore the Welsh Harp Reservoir this May Half Term for FREE activities at the Welsh...
2 events,
Action for Silk Stream – Free Half term activities at the Welsh Harp
Action for Silk Stream – Free Half term activities at the Welsh Harp
Let’s Go Wild at Welsh Harp! Come join us and explore the Welsh Harp Reservoir this May Half Term for FREE activities at the Welsh...
Action for Silk Stream – River Action Day at Watling Park
Action for Silk Stream – River Action Day at Watling Park
Join us for our Action for Silk Stream monthly volunteering days. They will be held on the last Thursday of each month. To book please...
2 events,
Action for Silk Stream – Free Half term activities at the Welsh Harp
Action for Silk Stream – Free Half term activities at the Welsh Harp
Let’s Go Wild at Welsh Harp! Come join us and explore the Welsh Harp Reservoir this May Half Term for FREE activities at the Welsh...
River Litter Detectives – Broomhouse Dock
River Litter Detectives – Broomhouse Dock
Book your place here Come along and join Thames21 as a river citizen scientist on the River Thames. We will be collecting the litter we...
1 event,
Cray River – Balsam Blitz
Cray River – Balsam Blitz
Himalayan Balsam, an invasive plant that damages our fragile river systems, it erodes the riverbanks, outcompeting native plants and grows readily in wet condition. Sadly, it has spread quite pervasively down many UK rivers like the Cray in Bexley.