urgent help please,the plot i have bought is the end one in a row of five.Having spoken to next door she is ok about going via her sewer , but the one next to her has said no as he thinks we should not be allowed to and has thretened to block both of us off if we go ahead.The other houses were constructed 20 yrs ago and there has never been any problems with this drainage.Each property is served by a4"pipe linking at the bottom of the gardens to a 6" which goes into a manhole in the road owned by local authority .Can this neighbour stop me or do i have to get all 4 property owners consent,by the way to try and go directly to road is approx £20,000, Help.