The drain was blocked in my IP. I After doing some inspection work, the plumber dug down 1 metre to expose sewer and council main sewer connection and found the root matter in council connection part of pipe which is suggestive of a council problem.The plumber unblocked the sewer from th house to the inspection opening but the sewer seems to still be blocked on the council side of the sewer. The person from water utility comany was called and came to site but he said that the roots were growing from the owners side of the pipe first and had then grown onto the council side of the connection. So it is not their responsiblity. I have to paid all the bills to the plumber. Could somebody advise whose responsibility it is on this situation?