Do you see drains – known as outfalls – spilling pollution into rivers when out on riverside walks? Do you know why this happens and would you like to help sort out the problem?

Our rivers should be healthy spaces for wildlife, but need protecting from many forms of pollution. One of them is household plumbing that is misconnected, meaning that foul water goes straight into the waterways through drains that should be connected to the sewage system.

This spring, river lovers along the Wandle and the Cray and Shuttle are being given the chance to train as citizen scientists to help rectify the problem in the latest roll out of the Outfall Safari programme.