I know the route. It's straight from the water meter through my drive then under the hallway and into the kitchen. I had seen this pipe when drive was done and I saw it again when kitchen floor was tiled. We had to replace few damaged joists that time. That's why I said no builder pointed this to me that this lead pipe should be changed. We had this opportunity twice and wasted those opportunities. Just got more info from Thames Water and it seems the risk is very very low and it can be reduced further by taking few steps.It doesn't necessarily need to follow the same route, or end up at the same place inside. I obviously don't know the specifics of your house, but there's often an alternative route.
Lead | Help | Thames Water
Learn more about lead and your water supply, including what to do if you have lead pipes and how our lead pipe replacements scheme could help you.
www.thameswater.co.uk
Now I won't be digging up to replace this. It may be easier to dig up the drive but can't do the kitchen.
Thanks.