Whilst dealing with a leaky bath I noticed that the floorboards around the base of the WC pan are damp and soft - presumably rotting. This particular bathroom is rarely used, but not unheated so doesn't suffer, AFAIK, from condensation.
Question: can sanitary ware become porous? The WC pan may be original which would make it 56 years old.
Bath and WC are too far apart from bath leak to have reached the WC.
TIA
Richard