Can I ask what your monthly water bill is? Ours is £100 per month, which is I think is crazy. 2 adults & 2 teens. I don’t think we have a leak. We have turned off the indoor water valve and left it for about an hour and the meter didn’t move. The water company sent us a high usage report and they claim we are using the equivalent of 9 baths a day of water. We are not doing this! What can we do?