Oh, Dave, we've done that too... when we moved in, we discovered the foul pipe had slipped. The edge was broken and the sewege was seeping out. This had softened the ground, making the foul trap tip and the foundations slip a little. All was fixed by just replacing the broken pipe and putting a new plastic pipe in place of the old Victorian 2" thick brown glazed clay trap.... which makes an interesting plant holder. The foundations had to be underpinned, and it gives an interesting slant to the dining room, but the smell lingered for a while... and a bit longer... and then the fine weather started....

Seems to be my week for it. I had my hand down a toilet at work this morning, unblocking paper from it. Some people have a strange idea of fun...

LTS