In message ,
harry writes

Dirty, smelly, but delighted :-)

Foul water(from the kitchen should not be going into the rainwater drain.
The crap from the kitchen has probably blocked a soakaway.

House built 1880-ish, NE Scotland, same system for both. Nothing is
blocked beyond the gully itself, and that is clear now.

Don't know why I chose today to do it, really. Well, yes I do. There
is a large pile of boxes waiting to go in the loft, and it is too warm
for lofts today.

--
Graeme