Just taken over the tenancy of a flat in a modern block, and the main bathroom smells of sewage. En suite does not smell.
I tried using a plunger in the toilet and it may have improved things, but not cured it. And it may be being masked a bit by the toilet block I put in.
I googled, and info seems to suggest it might be coming via the bath or basin, though I still suspect toilet is the problem.
Any advice? (Secretly hoping that Piglet John might help, as well as the rest of you lovely lot.)