D of E volunteers get stuck into removing rubbish from the River Thames at Twickenham.
The lads from Tower House School show the meaning of teamwork.
Previously, an invasive species survey was conducted in partnership with the Zoological Society of London.
Mostly what was found were invasive Asiatic clams.
While native species, such as these, were less abundant.
By the end of the day, a cage of rubbish had been collected.