meldrew's_mate said:All the Kestons have very flexible flue systems made up of fairly inexpensive muPVC pipe (though strange to note it is not sold in the Old Trafford Souvenir shop, just as well or it wouldn't be inexpensive ) It is also good to know that it's never been called Chelsea pipe for the same reasons......
....back to the flue, if you wanted to offer to pay to move the flue pipes I suggest you approach the neighbour with this solution before setting the hounds on him/her and cause conflict, he may not accept your kind offer after a row! Directing the flue vertically, or through another wall may reduce the noise considerably.
Thanks for your very contructive suggestions. I've now had a closer look at the pipework and it seems that the flue already goes vertically up the wall. In fact the noise appears to be coming from another pipe that sticks out of the wall at just above head height - is this an air intake? Any further thoughts gratefully accepted. Cheers.