> Our Victorian property still has a (shared) lead supply pipe. I've been repeatedly told it's not an issue due to (presumed) calcification on the inside of the pipe
In London or the general area? The water is lousy with calcium, hard AF, so that's a good bet.
The notorious lead in the water issue in Flint, Michigan was not just "pipes made from lead" but also that they carelessly switched water supply to a new one that over time, corroded the deposits off the inside of the pipes so that the lead could leach out.
Once that had happened, "the damage already done to Flint’s water supply infrastructure by more than 18 months of exposure to corrosive water. Even after the water supply was reconnected to the (original water supply), officials advised against drinking Flint water."
In London or the general area? The water is lousy with calcium, hard AF, so that's a good bet.
The notorious lead in the water issue in Flint, Michigan was not just "pipes made from lead" but also that they carelessly switched water supply to a new one that over time, corroded the deposits off the inside of the pipes so that the lead could leach out.
Once that had happened, "the damage already done to Flint’s water supply infrastructure by more than 18 months of exposure to corrosive water. Even after the water supply was reconnected to the (original water supply), officials advised against drinking Flint water."
https://www.britannica.com/event/Flint-water-crisis
As to what to do with your pipes - you can find water testing kits on the big online retailer for under £30