brick inspection chamber

Good people of DIYnot, I had been intending to check with building control but as they don't work weekends I've kept carrying on, worst case scenario the lot may have to come out and a plastic chamber put in, but Do you think running a plastic soil pipe into the existing chamber to meet the...

Hello, I was wondering if anyone could help with a problem thats come up when fitting a new shower, toilet & sink to a downstairs room? I need to find a way to attach the new soil pipe to the inspection chamber but the existing soil pipe line goes from plastic to clay and it's a bit puzzling...