OK, downstairs loo is slow to drain when flushed and the sink which feeds into the same soil stack is also slow to clear. Tried the plunger method in the loo and also blitzed with a stong caustic solution overnight. No good.
So opened up the inspection cover directly outside my front door (still on my property by about 2 metres) and the chamber is flooded so the blockage must be between the inspection cover and the main sewer, or the main sewer itself.
Options:-
Buy some rods and get poking around.
Get a “man” in.
Contact council (but presumably only their responsibility if it’s the main sewer).
(House is 1990 build, detached, not aware of shared private drain with neighbours.)
Any poo experts in da hoose ? 🙂