Events for 14th July 2026

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Dollis Brook Balsam Bash

Dollis Brook, Whetstone Stray 21 Longland Drive, Barnet

Bring the Dollis Brook back to life! Join us this summer in removing invasive non-native species (INNS) and litter from the Dollis Brook, supporting the...

Free

All our events and activities are open to communities.

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