I live in very old house, have done since DS1 was a baby. Checked the internal pipes were copper when we moved in, all fine; now having renovations done and architect has told me that the supply pipe from the mains to house could be lead as it is in the house next door ( I am also a bit worried about old lead paint as we had work done on window frames etc, before I realised it was such a big deal).
I am now worried that damage may have been done, DS1 has some behavioural issues and SEN and DS2 also has issues, DS3 is fine apart from really dodgy teeth.
I will get my water tested by Scottish water but I am really worried.