The original sewers are still fine but the tank system was getting a bit tired (it collapsed when the farmer dumped a few hundred tons of rubble on it) so I’ve installed a bacterial bubbling sewage treatment thing and used the original soak away which was for the separate latrine block for the workers outside. Still got the original toilet. The bunker and latrine originally had 3 soakaways so decided not to  fix something that has worked fine since 1942.
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