London Rivers Week 2025: Rivers & People – Plasticblitz

Cornmill Gardens Waterway Avenue, Lewisham, London, United Kingdom

Join Rivers & People for a Plasticblitz event as part of London Rivers Week 2025. We'll be picking up and itemising litter on the riverbanks...

Free

London Rivers Week 2025: Summer Tree Walk

Hammersmith Bridge

Join charity Barnes Common for a stroll along the Thames towpath to learn about riverside trees, including the rare female Black Poplars in this area!...

River Litter Detectives – Limekiln Dock

Limekiln Dock Junction of Three Colt St/Milligan St, London, United Kingdom

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...

London Rivers Week 2025: Wandle clean up

Tooting and Mitcham Football Club Bishopsford Road, London, England, United Kingdom

Join our friends South East Rivers Trust at Ravensbury Park to enter the water in waders and help remove litter and plastic pollution. There are...

London Rivers Week 2025: Where there’s a weir, there’s a way

Carshalton River Gardens, Carshalton, England, United Kingdom

Join a geomorphologist (mud/gravel expert) from the Environment Agency on this 2.5 mile walk of the River Wandle from Wilderness Island (nearest stations Hackbridge/Carshalton) to...

Free

London Rivers Week 2025: Elmbridge Meadows Guided Walk

Elmbridge Meadows Elmbridge Meadows Open Space,Elmbridge Meadows, Surbiton, United Kingdom

Join our friends South East Rivers Trust for a leisurely stroll along the Hogsmill, from the north end of Elmbridge Meadows to the southern end...

River Litter Detectives – Queenhithe

Queenhithe, City of London by the Queenhithe Mosaic, City of London, London, United Kingdom

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...

Action for Silk Stream – River Action Day

Silk Stream Park wetland Silk stream park wetland, Barnet

Join us for our Action for Silk Stream monthly volunteering days. They will be held on the last Thursday of each month. We will be...

All our events and activities are open to communities.

Corporate groups, please book with Thames21 using our corporate volunteering page