Oh the joys...

Don't worry, it is all fixed now. I bought some nasty chemical to unblock it with. It seems to have worked for now.

A few years ago we had to have dynarod out, and they said there were some roots growing through cracks in the pipe that connects to the sewer, which they removed. I wonder if they have grown back again.

No wonder the leylandii had grown so tall.

What an unpleasant thought.