Well, it may have been pretty crap and didn't drain properly, but it certainly didn't give up without a fight.
Converting a now ex bathroom into a bedroom for youngest child. Took out old shower enclosure, which was built into a large cupboard. Rather than studwork, it was constructed out of Thermalite blocks, which was certainly solid.
3m^3 of rubble to demolish and move was rather more effort than I felt should have been required