I live in the countryside, neighbour on one side, who has been a great friend, with a septic tank that empties via a pipe under my garden, worked fine for 10 years, all good. New neighbours dug a hole in their garden and damaged the drain that her septic tank emptied into and now it backs up into my garden. New neighbours say it was obviously damaged before they dug and its not their responsibility. Old neighbour/friend has said.....she had her tank emptied there is nothing left in there/ its only treated water that comes out/ the pipes are on my land so its my responsibility. Now she wont speak to me. Neither neighbours want anything to do with the problem, nor with me now. I tried to get the council environmental health to sort it but they said it wasnt their responsibility either. So Im stuck with a septic tank emptying onto my garden. I want to get a solicitor to write to them and tell them to sort it out but Im afraid it will make matters worse. Help