© Joel Goodman - 07973 332324 - all rights reserved . 27/09/2023 . Staffordshire , UK . LIZZIE CARR (r) , pictured on the Trent and Mersey Canal in Stone , shows RICHARD COOKE (49) how to test water in the canal and log findings. Lizzie has built an app and recruited a network of supporters who measure and monitor the health of waterways across Britain . Photo credit : Joel Goodman