Hello, i've just purchased a property and building work is about to commence on the new kitchen exstension. Im currently involved with negotiating the party wall agreement with my neighbour and as part of this process we are having slight issues with the position of my neighbours boiler flue which discharges onto my property and will become blocked once the kitchen exstension is complete. Hopefully this situation can be resolved through discussions. My issue here is that this is completely against byelaws for the discharge of waste (onto my property) and I would like to know how you go about enforcing the byelaws and getting my neighbour to rectify his incorrectly positioned boiler flue?