It's very confusing to be told one thing by one department and then another by a different department, none of whom appear to know what is going on.

The discrepancies you mention in your first post may come from the possibility that you are on a different ring main than those premises that have been forced to close. An example of this is my own area. When the power goes out on my side of the road, the other side, though only a couple of dozen feet away, remains lit. If your water supply is not coming from the affected area, authorities will consider you to be 'OK' and concentrate their efforts on those areas that are supplied from contaminated sources.

Good luck, and keep taking the tablets!

LTS