Many thanks for getting back to me so quickly.
The flat is in the South sea Street block.
Have these main drains been recently cleaned
I will contact the plumber again to
make sure he cleared all of the interior drains.
From what point are drains communal?
The plumber did mention that the shower
pipe is connected to the kitchen drain and
does not go straight to the main drain. Do you know if this
is the way the flat was designed? Any advice based on previous
experiences. And yes, I have asked tenants
NOT to pour grease down the sink.