Hi Admin, thank you for that very informative reply, I would like to try and do something to help, if only writing letters and getting it back on the agenda, I will have a walk around the area tomorrow, something that doesn't ring quite right though is dye down every toilet, you would only need to put the dye into the main manholes (which would be shown on STW drawings) to narrow the search down considerably. Is it ok if I try and move forward with this?